TidePlanet

Weather in Groton Long Point

14-day forecast · updated today, Wednesday, October 28, at 7:03 pm (EDT)
Now · mainly clear 50 °F
Feels like
45 °F
Low / high
36 / 55 °F
Rain
0%
Wind
6 mph SSW
→ 30.40 inHg · steady

Today in Groton Long Point: overcast, 36 °F to 55 °F, with a 0% chance of rain and a light breeze from the south-southwest (6 mph). Tomorrow, clear sky, 50 °F to 64 °F and a 1% chance of rain. The warmest day of the week is Friday 30, at 66 °F. Next likely rain: Wednesday 4 (18%).

Measured now at the airport

Groton-New London (KGON), 2.3 mi away · 7 min ago

Visibility9.9 mi or more
WeatherNothing to note
Temperature52 °F
WindCalm

It's what the airport's weather station measured, not a forecast: on the coast, wind and fog can be different. Airports report every 30 or 60 minutes.

Airport METAR report, via NOAA's Aviation Weather Center (aviationweather.gov). Sources and licenses

Temperatures for the next 14 days

Day by day

Day Sky Low / high Rain Max wind Max wave High tides Model
Today · 28 Overcast 36 / 55 °F 0% 7 mph WSW 1.5 ft 11:01 am · 11:28 pm HRRR
Thu 29 Clear sky 50 / 64 °F 1% 10 mph SW 1.6 ft 11:54 am HRRR + NBM
Fri 30 Light drizzle 47 / 66 °F 3% 12 mph WNW 1.8 ft 12:21 am · 12:53 pm NBM
Sat 31 Mainly clear 41 / 57 °F 0% 8 mph NNW 1.4 ft 1:21 am · 1:58 pm NBM
Sun 1 Mainly clear 38 / 59 °F 0% 7 mph WSW 0.9 ft 1:27 am · 2:06 pm NBM
Mon 2 Partly cloudy 46 / 62 °F 7% 7 mph WSW 1.0 ft 2:36 am · 3:13 pm NBM
Tue 3 Overcast 48 / 63 °F 12% · 0.02 in 8 mph ENE 1.1 ft 3:43 am · 4:17 pm NBM
Wed 4 Overcast 49 / 62 °F 18% · 0.49 in 10 mph ESE 2.2 ft 4:44 am · 5:14 pm NBM
Thu 5 Overcast 51 / 62 °F 39% · 0.45 in 11 mph E 2.0 ft 5:38 am · 6:05 pm NBM
Fri 6 Light rain 51 / 62 °F 45% · 0.83 in 13 mph SW 4.1 ft 6:25 am · 6:51 pm NBM
Sat 7 Rain 46 / 59 °F 32% · 0.21 in 10 mph NW 4.3 ft 7:09 am · 7:34 pm NBM
Sun 8 Overcast 38 / 57 °F 21% · 0.11 in 10 mph NW 3.3 ft 7:50 am · 8:16 pm NBM + ECMWF
Mon 9 Clear sky 34 / 59 °F 12% 7 mph NNW 1.8 ft 8:31 am · 8:58 pm ECMWF
Tue 10 Overcast 35 / 57 °F 14% 7 mph NE 1.6 ft 9:12 am · 9:39 pm ECMWF

Each hour comes from the best model for this spot: HRRR until Thursday 29 2:00 pm; then NBM until Sunday 8 2:00 pm; then ECMWF until Thursday 12 10:00 am; then GFS.

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.

Today, every 3 hours

Time 12:00 am3:00 am6:00 am9:00 am12:00 pm3:00 pm6:00 pm9:00 pm
Sky Partly cloudyClearClearPartly cloudyOvercastOvercastOvercastMainly clear
Temperature 40°39°38°42°54°55°52°49°
Chance of rain 0%0%0%0%0%0%0%0%
Rain 0.00 in0.00 in0.00 in0.00 in0.00 in0.00 in0.00 in0.00 in
Wind (mph) 4 NNE5 N5 N6 NNE5 SSE6 S4 SSW6 SW
Humidity 90%75%60%63%58%64%61%74%
UV 00013100
Model HRRRHRRRHRRRHRRRHRRRHRRRHRRRHRRR

Do the models agree?

High confidence

The models agree for the next few days: the forecast is fairly solid.

What 6 forecast models say for the next few days. The closer they are, the more reliable the forecast.

Do the models agree? · High
High (°F) TodayThu 29Fri 30Sat 31Sun 1Mon 2Tue 3
ECMWF 58°65°67°54°59°65°66°
AIFS 57°65°69°57°58°67°71°
GFS 54°63°68°56°57°60°61°
ICON 58°65°69°55°61°68°65°
HRRR 55°62°—————
NBM 57°64°66°57°59°62°63°
Confidence highhighhighhighhighmediumhigh
Do the models agree? · Rain
Rain TodayThu 29Fri 30Sat 31Sun 1Mon 2Tue 3
ECMWF 000.02 in0000
AIFS 0000000
GFS 0000000
ICON 0000000
HRRR 00—————
NBM 0000000.01 in
Confidence highhighhighhighhighhighhigh
Do the models agree? · Wind
Wind (mph) TodayThu 29Fri 30Sat 31Sun 1Mon 2Tue 3
ECMWF 71311241326820620720819
AIFS 710119577
GFS 811132720301126111110161417
ICON 41292411308217218231026
HRRR 7141224—————
NBM 61110181222818711712814
Confidence highhighhighhighhighhighhigh

Chance of rain from the ensemble models

Model TodayThu 29Fri 30Sat 31Sun 1Mon 2Tue 3
ECMWF (51 scenarios) 0%0%4%0%0%0%3%
GFS (GEFS, 31 scenarios) 0%0%3%0%0%26%29%
NBM (NOAA) 0%1%3%0%0%7%12%
Thunderstorm (NBM) 0%0%3%0%0%1%1%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

Next few weeks, compared with normal: a bit warmer, normal rain and a slightly warmer sea.

Next 6 weeks

When TemperatureTemp. Rain Sea Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8 Above +4.5 °F A bit above +35% A bit above +0.7 °F —
Nov 9 – Nov 15Nov 9–Nov 15 A bit above +1.3 °F Normal A bit above +1.1 °F 53° / 49°
Nov 16 – Nov 22Nov 16–Nov 22 A bit above +2.0 °F Normal A bit above +0.9 °F 52° / 48°
Nov 23 – Nov 29Nov 23–Nov 29 A bit above +2.2 °F A bit above +32% A bit above +0.9 °F 50° / 46°
Nov 30 – Dec 6Nov 30–Dec 6 A bit above +1.6 °F A bit above +20% A bit above +0.5 °F 48° / 44°

Coming months

When TemperatureTemp. Rain Sea
November A bit above +1.1 °F A bit above +24% A bit above +0.5 °F
December A bit above +2.5 °F A bit above +27% A bit above +1.3 °F
January Above +3.4 °F A bit above +36% A bit above +1.4 °F
February Above +2.7 °F A bit above +26% Above +1.8 °F
March Above +2.7 °F A bit above +21% Above +2.0 °F

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give.

Groton Long Point climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Groton Long Point is from June to September: highs of 75 °F to 82 °F, about 8 rainy days a month and 7 hours of sunshine a day.

Hurricane season: from July to September. In the last 30 years (1996–2025), 9 tropical cyclones passed within 93 mi of Groton Long Point, about 3 every 10 years. The most recent: Henri, in August 2021.

Month High Low Rain Rainy daysDays Sun (h/day) Water Waves Cyclones
JanuaryJan 38° 22° 3.76 in 8 3.8 42° 4.5 ft –
FebruaryFeb 40° 22° 3.38 in 7 5.0 39° 4.2 ft –
MarchMar 47° 29° 4.74 in 9 5.4 39° 4.0 ft –
AprilApr 56° 38° 4.24 in 9 6.2 44° 3.9 ft –
MayMay 67° 47° 3.34 in 9 6.6 52° 3.2 ft –
JuneJun 75° 56° 3.92 in 9 7.4 61° 2.8 ft 1
JulyJul 82° 63° 3.37 in 9 8.0 69° 2.7 ft 3
AugustAug 81° 63° 4.07 in 9 7.3 71° 2.7 ft 3
SeptemberSep 75° 56° 4.17 in 8 6.1 68° 3.4 ft 2
OctoberOct 64° 45° 4.66 in 8 4.8 63° 4.0 ft –
NovemberNov 54° 36° 4.19 in 7 3.7 55° 4.2 ft –
DecemberDec 44° 28° 4.66 in 9 3.2 48° 4.3 ft –
Month Water Waves Cyclones
Jan 42° 4.5 ft –
Feb 39° 4.2 ft –
Mar 39° 4.0 ft –
Apr 44° 3.9 ft –
May 52° 3.2 ft –
Jun 61° 2.8 ft 1
Jul 69° 2.7 ft 3
Aug 71° 2.7 ft 3
Sep 68° 3.4 ft 2
Oct 63° 4.0 ft –
Nov 55° 4.2 ft –
Dec 48° 4.3 ft –

Days: rainy days in the month. Sun: hours a day.

A normal year brings 48.50 in of rain on about 99 days and about 2,050 hours of sunshine.

Cyclones: how many tropical cyclones (tropical storms, hurricanes and typhoons) passed within 93 mi in each month from 1996 to 2025, according to IBTrACS (NOAA).

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now50 °Ffeels like 45 °F
Tomorrow50 / 64 °F

It's 50 °F now (feels like 45 °F). Today, 36 °F to 55 °F; tomorrow, 50 °F to 64 °F.

Chance of rain

  • Today 0%
  • Thu 29 1%
  • Fri 30 3%
  • Sat 31 0%
  • Sun 1 0%
  • Mon 2 7%
  • Tue 3 12% 0.02 in

Today the chance of rain reaches 0%. The next day with likely rain is Wednesday 4: 18% and 0.49 in.

No rain in the last 7 days.

Humidity and dew point

Humidity65%
Dew point39 °F

Humidity is 65% now and the dew point is 39 °F.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now17 migood
Clouds47%

Visibility is good now (17 mi). No fog expected today.

The model gives visibility up to about 15 mi: beyond that, the horizon is clear.

UV index

Now0
Today's peak3moderate

Thu 29: 3 · Fri 30: 3 · Sat 31: 3

IndexLevelWhat to do
0–2lowNo special protection needed.
3–5moderateHat, sunglasses and sunscreen around midday.
6–7highSunscreen, hat and shade between 12 and 4 pm.
8–10very highAvoid the midday sun; reflection off the water adds to it.
11+extremeAvoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

  • ↗ Rising Anglers say fish bite less for a while
  • → Steady · now Anglers expect normal activity
  • ↘ Falling Anglers say fish feed more before the change

Steady now (+0.00 inHg in 3 hours). Over the next 48 hours: −0.29 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityGood · 29
Saharan dustNo

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

DaySkyLow / highRainMax wind
Tue 27 Partly cloudy41 / 59 °F09 mph N
Mon 26 Clear sky39 / 69 °F010 mph WNW
Sun 25 Clear sky32 / 67 °F06 mph WNW
Sat 24 Overcast30 / 62 °F06 mph NNW
Fri 23 Clear sky39 / 59 °F010 mph NNE
Thu 22 Overcast46 / 65 °F014 mph N
Wed 21 Overcast46 / 60 °F014 mph NNE
Show all 30 days
DaySkyLow / highRainMax wind
Tue 20 Overcast41 / 66 °F013 mph NNE
Mon 19 Clear sky36 / 62 °F08 mph NE
Sun 18 Clear sky34 / 57 °F08 mph NNE
Sat 17 Drizzle40 / 62 °F0.14 in13 mph NNW
Fri 16 Light rain49 / 69 °F0.41 in13 mph SSW
Thu 15 Overcast51 / 65 °F012 mph NNW
Wed 14 Overcast62 / 80 °F012 mph W
Tue 13 Light drizzle54 / 65 °F0.02 in9 mph SSE
Mon 12 Light drizzle53 / 71 °F0.04 in10 mph N
Sun 11 Rain46 / 60 °F1.25 in12 mph E
Sat 10 Overcast48 / 66 °F07 mph NW
Fri 9 Overcast49 / 69 °F013 mph WNW
Thu 8 Mainly clear54 / 74 °F011 mph WSW
Wed 7 Clear sky40 / 64 °F09 mph SW
Tue 6 Clear sky46 / 61 °F011 mph WNW
Mon 5 Light drizzle53 / 70 °F0.01 in13 mph WNW
Sun 4 Light drizzle48 / 64 °F0.09 in9 mph ENE
Sat 3 Light drizzle54 / 71 °F0.01 in10 mph NNE
Fri 2 Overcast66 / 80 °F010 mph SW
Thu 1 Overcast58 / 75 °F09 mph SW
Wed 30 Light drizzle58 / 69 °F0.01 in6 mph WNW
Tue 29 Overcast54 / 68 °F08 mph NW
Mon 28 Light rain55 / 61 °F0.83 in15 mph NNE

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in Groton Long PointQuestions

What's the weather like today in Groton Long Point?

Overcast, from 36 °F to 55 °F, with a light breeze from the south-southwest (6 mph) and a 0% chance of rain.

Will it rain tomorrow in Groton Long Point?

On Thursday 29 the chance of rain is 1% (0.00 in): clear sky.

How warm will it be this week?

Between a low of 36 °F and a high of 66 °F; the warmest day, Friday 30.

What's the UV index today?

It reaches 3 (moderate). Hat, sunglasses and sunscreen around midday.

Is the pressure rising or falling?

It's 30.40 inHg and steady: +0.02 inHg over the last 24 hours.

When is the best time to visit Groton Long Point?

The best time to visit Groton Long Point is from June to September: highs of 75 °F to 82 °F, about 8 rainy days a month and 7 hours of sunshine a day.

What is the weather like in Groton Long Point in October?

In October, Groton Long Point normally sees highs of 64 °F and lows of 45 °F, with about 8 rainy days (4.66 in for the month) and 5 hours of sunshine a day. The sea is around 63 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Groton Long Point?

The warmest is July, with average highs of 82 °F, and the coldest January, with lows of 22 °F. The wettest is March (4.74 in) and the driest, May.

When is hurricane season in Groton Long Point?

Hurricane season: from July to September. In the last 30 years (1996–2025), 9 tropical cyclones passed within 93 mi of Groton Long Point, about 3 every 10 years. The most recent: Henri, in August 2021.

More about Groton Long Point today

Weather near Groton Long Point

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 13 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 7:03 pm (local time).

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