


None


Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 69. North wind around 5 mph.

Mostly cloudy, with a low around 46. Calm wind becoming northeast around 5 mph.

Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 64. North wind around 5 mph.

Cloudy, with a low around 42. Calm wind.


Mostly cloudy, with a high near 63. Northeast wind around 5 mph.

Mostly cloudy, with a low around 44.

Mostly cloudy, with a high near 60. Northeast wind around 5 mph.

Partly cloudy, with a low around 41.

Mostly sunny, with a high near 63.

Partly cloudy, with a low around 44.

Mostly sunny, with a high near 59.

Partly cloudy, with a low around 41.














Showers, mainly before 2am. Patchy fog. Low around 48. Calm wind becoming north around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.


Showers, mainly before 11pm. Patchy fog before 7pm, then patchy fog after 8pm. Low around 45. Calm wind. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Notes from Rich:
What is the 'Regular’ Schedule.
Weekdays: Morning updates each day before 8AM, Evening Updates before 7PM.
On Weekends: Perhaps a bit later. I like to sleep in.
Every Thursday morning I post the daily forecast through the weekend.
Back to the regular update schedule
Looks like the rain ends around midnight here in SW NH, early Monday AM going east. Expect a damp night tonight, followed by several days of dry and increasingly cool weather. Overnight temperatures will often fall into the 30s and 40s, and some areas away from the mountains could see frost on the coldest nights. The late-week coastal system is something to watch, but there is not yet enough confidence to determine how much of an impact it will have locally.
A period of light rain will continue tonight as low pressure passes south of New England. Rainfall amounts are expected to remain modest, with no flooding concerns, but areas of fog could become locally dense overnight. Fair and seasonably cool weather is expected Monday through at least Wednesday, with cool nights and the possibility of frost in some locations. Looking ahead, a potentially slow-moving coastal storm could develop near the East Coast late in the week, but its eventual track and strength remain uncertain. Depending on the track, the system could bring rain, gusty northeast winds, and high surf next weekend.
Tropical Storm Fay has formed in the Atlantic. She won't be bothering anyone.
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Summary:
A period of light rain will continue tonight as low pressure passes south of New England. Rainfall amounts are expected to remain modest, with no flooding concerns, but areas of fog could become locally dense overnight. Fair and seasonably cool weather is expected Monday through at least Wednesday, with cool nights and the possibility of frost in some locations. Looking ahead, a potentially slow-moving coastal storm could develop near the East Coast late in the week, but its eventual track and strength remain uncertain. Depending on the track, the system could bring rain, gusty northeast winds, and high surf next weekend.
Key Messages:
- Low pressure will continue to bring a period of rain tonight.
- High pressure over southern Canada slides east Monday through Wednesday, providing fair weather and seasonably cool temperatures.
- There is a signal for a slow-moving coastal system near the East Coast late in the week. Impacts will depend on the track, which remains uncertain at this time range. The potential exists for rain, gusty northeast winds, and high surf sometime next weekend.
What has changed since the last Forecast Update?
No significant changes since the previous forecast cycle.
What this means for you:
Expect a damp night tonight, followed by several days of dry and increasingly cool weather. Overnight temperatures will often fall into the 30s and 40s, and some areas away from the mountains could see frost on the coldest nights. The late-week coastal system is something to watch, but there is not yet enough confidence to determine how much of an impact it will have locally.
**Area Forecast Discussion, National Weather Service Gray ME, 246 PM EDT Sunday, September 20, 2026**
**What Has Changed**
No significant changes since the previous forecast cycle.
**Key Messages**
1. Low pressure will continue to bring a period of rain tonight.
2. High pressure over southern Canada slides east Monday through Wednesday, providing fair weather and seasonably cool temperatures.
3. There is a signal for a slow-moving coastal system near the East Coast late in the week. Impacts will depend on the track, which remains uncertain at this time range. The potential exists for rain, gusty northeast winds, and high surf sometime next weekend.
**Discussion**
**Key Message 1**
Low pressure passing to our south along a nearly stationary frontal boundary will continue to bring a period of light rainfall through the first half of tonight. No flooding issues are expected, with precipitation amounts generally ranging from a tenth of an inch or less from Augusta and points north and east, with a quarter to a half inch elsewhere.
Fog is likely overnight as light winds allow low-level moisture to remain in place, and some areas could experience locally dense fog. Low temperatures will range from the lower 40s across much of interior Maine to the middle and upper 40s elsewhere.
**Key Message 2**
Confidence is high that fair weather will prevail Monday through at least Wednesday, with fair weather likely continuing into Friday. Broad high pressure over southern Canada will be responsible for this fair weather as it gradually moves east through the week.
Because the high pressure system will remain centered north of the area, temperatures will trend cooler than normal during both the daytime and overnight hours. Highs will generally be in the low to mid 60s, with overnight lows in the 30s and 40s.
Conditions will often be favorable for radiational cooling, meaning the ground can cool efficiently under clear skies and light winds. As a result, some locations south of the mountains could experience frost on some nights.
**Key Message 3**
For the past several model cycles, there has been a signal for a cutoff upper-level low near the East Coast that could generate at least one surface low near the Gulf Stream. While this signal has been somewhat consistent, there has been considerable variation from one weather model to another and from one model run to the next regarding the strength and track of a potential coastal low late in the week and into next weekend.
The current range of possibilities extends from a storm that stays mostly south and east of the area to a seasonably strong area of low pressure near the Gulf of Maine. A storm that stays farther south and east would still likely produce some high surf and possibly measurable rain. A storm farther west and closer to the Gulf of Maine would have greater potential to produce coastal impacts, along with gusty winds and rain extending into the interior.
This system is still about six days away, so it will likely take another couple of days before there is greater confidence in its eventual track and strength.
Summary:
A cool, damp pattern continues through Monday, with light rain ending early Monday followed by breezy northerly winds, clouds, and temperatures mainly in the 60s. Dry and cool weather is expected through the middle of the week, but attention is turning to a developing coastal low that could bring strong winds, rain, and coastal impacts from Thursday into next weekend. Confidence is highest for strong winds over the ocean waters, where a Gale Watch is now in effect.
Key Messages:
- Light rain continues this afternoon into early Monday morning. Monday afternoon will be breezy, cloudy, and cooler.
- Dry and cool conditions are expected through midweek. Forecasters are watching the potential for a coastal low to develop during the middle to latter part of the week, bringing the possibility of strong winds and rainfall heading into the weekend.
What has changed since the last Forecast Update?
A Gale Watch has been issued for portions of the southern ocean waters from Tuesday afternoon into Thursday.
What this means for you
Expect a chilly, wet evening tonight, with rain gradually ending before or around daybreak Monday. Monday will stay cloudy and cool with gusty winds, especially along the coast. Tuesday and Wednesday should be mostly dry but cooler than normal. A potentially stronger coastal storm later in the week could bring periods of rain, gusty winds, and coastal flooding or erosion concerns, although the exact track and strength remain uncertain.
**Area Forecast Discussion, National Weather Service Boston/Norton MA,
353 PM EDT Sun Sep 20 2026**
**What has Changed**
A Gale Watch has been issued for portions of the southern ocean waters from Tuesday afternoon into Thursday.
**Key Messages**
* Light rain continues this afternoon into early Monday morning. Monday afternoon will be breezy, cloudy, and cooler.
* Dry and cool conditions are expected through midweek. Forecasters are watching the potential for a coastal low to develop during the middle to latter part of the week, bringing the possibility of strong winds and rainfall heading into the weekend.
**Discussion**
**Key Message 1, Light rain tonight, followed by a cool and breezy Monday**
A raw, cool, and rainy afternoon continues across southern New England, with rain persisting through much of the evening. The rain will be primarily stratiform, meaning it will be widespread and steady rather than coming from individual thunderstorms, with generally light and occasionally moderate rainfall rates. A rumble of thunder cannot be completely ruled out near the south coast, although the risk is quite low.
Additional rainfall amounts of 0.25 to 0.75 inch are expected, with some localized variation. Flooding is not a concern with this event. Rain will gradually shift offshore overnight and should end by or before daybreak Monday. Conditions will remain raw and wet overnight, with lows in the upper 40s to lower 50s and breezy northerly winds.
On Monday, showers will linger just offshore along a frontal boundary while strong high pressure, around 1030 millibars, builds in from the northwest. This will tighten the pressure gradient, which means the difference in air pressure across the region will increase and produce stronger winds. Breezy north-northeast winds are expected throughout the day, especially near the coast where gusts could reach 20 to 25 mph.
Clouds will remain stubborn for much of the day, although there may be a few breaks of sunshine. Temperatures will remain cool, with highs mainly in the 60s. Clouds will continue Monday night, with lows falling into the 40s across much of the region and remaining in the lower 50s in the urban centers.
**Key Message 2, Dry and cool through midweek, with a potential coastal system later in the week**
Ensemble guidance, which uses multiple model simulations to assess the range of possible outcomes, remains in good agreement that an unusually strong area of high pressure will develop over Quebec Tuesday and persist into Wednesday and Thursday. This system is likely to keep temperatures across New England cooler than normal, generally in the low to mid 60s, as a cooler air mass settles in and northeasterly winds persist for several days.
Despite the large area covered by the Canadian high pressure system, forecast guidance indicates that a weak low pressure system could develop Tuesday over the Mid-Atlantic region and move far enough north into New Jersey to bring spotty showers to southern New England. There is still uncertainty about how far north this low will move, but there is general agreement on at least a low-end chance of precipitation along the southern coast Tuesday, with higher chances across southern Connecticut and closer to New York City.
Both individual forecast models and ensemble guidance continue to indicate the potential for a coastal low to develop Wednesday into the latter part of the week. There is still considerable uncertainty at this time. The overall trend has been for the low to slowly move north into the waters south of Nantucket, but the forecast models differ on the exact track. The GFS, or Global Forecast System, takes the low farther northeast and closer to Nantucket, while the ECMWF, or European Centre for Medium-Range Weather Forecasts model, tracks it farther northwest and closer to Long Island.
Regardless of the eventual track, this system could bring strong winds, rain, and the potential for coastal erosion and coastal flooding.
**Winds and marine conditions**
The highest confidence at this time is for strong winds, especially over the ocean waters. As the coastal low strengthens and approaches from the south, the Canadian high pressure system over Quebec is also expected to strengthen and expand. This would create an increasingly tight pressure gradient over New England, supporting stronger winds.
There is still uncertainty regarding how strong the low and high pressure systems will become and exactly where the low will track. That means there is still uncertainty about how strong the overall wind field will become. However, confidence is increasing that gale force winds will develop across the southern ocean waters. A Gale Watch has been issued for Tuesday evening through at least Thursday morning.
The latest ensemble guidance also shows roughly a 50 percent probability of storm force wind gusts across the ocean waters south of Long Island and Block Island. There are also 20 to 30 percent probabilities of storm force gusts over Nantucket Sound and Cape Cod Bay as the coastal low strengthens Friday into Saturday.
Winds over land along the south coast, Cape Cod, and the Islands are expected to be somewhat weaker than the marine winds, but still gusty, generally around 25 to 35 mph.

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