Weather in Castine

14-day forecast · updated today, Thursday, October 29, at 7:08 am (EDT)

Now · clear 46 °F

Feels like: 40 °F
Low / high: 45 / 56 °F
Rain: 1%
Wind: 6 mph SW

→ 30.20 inHg · steady

Today in Castine: partly cloudy, 45 °F to 56 °F, with a 1% chance of rain and a light breeze from the southwest (6 mph). Tomorrow, drizzle, 48 °F to 62 °F and a 29% chance of rain. The warmest day of the week is Friday 30, at 62 °F. Next likely rain: Wednesday 4 (26%).

Temperatures for the next 14 days

56° 45°
Today
62° 48°
Fri 30
50° 38°
Sat 31
54° 35°
Sun 1
60° 42°
Mon 2
56° 44°
Tue 3
58° 47°
Wed 4
57° 47°
Thu 5
58° 49°
Fri 6
53° 44°
Sat 7
52° 41°
Sun 8
55° 40°
Mon 9
56° 47°
Tue 10
49° 45°
Wed 11

Day by day

Day	Sky	Low / high	Rain	Max wind	Max wave	High tides	Model
Today · 29	Partly cloudy	45 / 56 °F	1%	15 mph SSW	2.1 ft	1:27 am · 1:40 pm	HRRR
Fri 30	Drizzle	48 / 62 °F	29% · 0.02 in	14 mph W	2.0 ft	2:20 am · 2:34 pm	HRRR + NBM
Sat 31	Clear sky	38 / 50 °F	0%	13 mph NW	1.0 ft	3:19 am · 3:35 pm	NBM
Sun 1	Clear sky	35 / 54 °F	0%	9 mph WSW	0.8 ft	3:22 am · 3:41 pm	NBM
Mon 2	Light drizzle	42 / 60 °F	2%	8 mph WSW	1.0 ft	4:30 am · 4:51 pm	NBM
Tue 3	Overcast	44 / 56 °F	17%	7 mph NE	1.0 ft	5:37 am · 6:00 pm	NBM
Wed 4	Overcast	47 / 58 °F	26% · 0.04 in	9 mph SSE	2.7 ft	6:40 am · 7:05 pm	NBM
Thu 5	Overcast	47 / 57 °F	27% · 0.06 in	10 mph SSW	1.2 ft	7:37 am · 8:04 pm	NBM
Fri 6	Overcast	49 / 58 °F	39% · 0.93 in	11 mph SSE	2.0 ft	8:28 am · 8:56 pm	NBM
Sat 7	Rain	44 / 53 °F	34% · 0.18 in	10 mph E	3.9 ft	9:14 am · 9:44 pm	NBM
Sun 8	Rain	41 / 52 °F	20% · 0.09 in	10 mph NW	3.8 ft	9:56 am · 10:28 pm	NBM
Mon 9	Light drizzle	40 / 55 °F	16% · 0.01 in	10 mph W	2.0 ft	10:36 am · 11:09 pm	NBM + ECMWF
Tue 10	Overcast	47 / 56 °F	18%	5 mph NW	1.0 ft	11:14 am · 11:49 pm	ECMWF
Wed 11	Drizzle	45 / 49 °F	14% · 0.21 in	6 mph NNE	1.0 ft	11:52 am	ECMWF

Each hour comes from the best model for this spot: HRRR until Friday 30 2:00 am; then NBM until Monday 9 2:00 am; then ECMWF until Thursday 12 10:00 pm; 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 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Clear	Clear	Clear	Clear sky	Clear sky	Clear sky	Clear	Mainly clear
Temperature	45°	46°	46°	50°	55°	56°	54°	54°
Chance of rain	1%	1%	0%	0%	0%	0%	0%	0%
Rain	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	7 SW	7 SW	7 SW	6 SSW	11 SSW	15 SSW	12 SSW	12 SSW
Humidity	72%	73%	81%	79%	72%	73%	82%	79%
UV	0	0	0	1	3	1	0	0
Model	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR	HRRR

Do the models agree?

Medium confidence

They broadly agree, but not quite on rain tomorrow: take it with some caution.

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

HighRainWind

Do the models agree? · High
High (°F)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	60°	62°	47°	53°	64°	49°	49°
AIFS	62°	62°	47°	51°	61°	64°	69°
GFS	60°	64°	48°	54°	63°	52°	51°
ICON	58°	62°	48°	52°	64°	53°	54°
HRRR	56°	60°	—	—	—	—	—
NBM	60°	62°	50°	54°	60°	56°	58°
Confidence	high	high	high	high	high	medium	medium

Do the models agree? · Rain
Rain	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	0	0.07 in	0	0	0.07 in	0	0
AIFS	0.01 in	0.04 in	0	0	0.02 in	0.03 in	0.02 in
GFS	0	0.06 in	0	0	0	0	0
ICON	0	0.04 in	0	0	0.02 in	0	0
HRRR	0	0	—	—	—	—	—
NBM	0	0.02 in	0	0	0	0	0.04 in
Confidence	high	medium	high	high	high	high	high

Do the models agree? · Wind
Wind (mph)	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF	919	1224	1227	821	1022	719	723
AIFS	12	13	14	9	9	6	5
GFS	1129	1831	1830	819	916	916	918
ICON	1121	1326	1630	918	817	916	1020
HRRR	1525	1630	—	—	—	—	—
NBM	1327	1427	1325	917	816	715	920
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3	Wed 4
ECMWF (51 scenarios)	0%	88%	0%	1%	14%	21%	31%
GFS (GEFS, 31 scenarios)	0%	81%	3%	0%	1%	25%	42%
NBM (NOAA)	1%	29%	0%	0%	2%	17%	26%
Thunderstorm (NBM)	0%	0%	0%	0%	2%	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 and normal rain.

Next 6 weeks

When	TemperatureTemp.	Rain	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Above +4.0 °F	Normal	—
Nov 9 – Nov 15Nov 9–Nov 15	A bit above +1.1 °F	Normal	—
Nov 16 – Nov 22Nov 16–Nov 22	A bit above +2.2 °F	A bit below −24%	46° / 37°
Nov 23 – Nov 29Nov 23–Nov 29	Above +2.7 °F	A bit above +28%	43° / 36°
Nov 30 – Dec 6Nov 30–Dec 6	A bit above +2.5 °F	A bit above +23%	40° / 33°

Coming months

When	TemperatureTemp.	Rain
November	A bit above +1.4 °F	Normal
December	Above +4.3 °F	A bit above +22%
January	Well above +5.8 °F	A bit above +37%
February	Above +4.3 °F	Normal
March	Above +4.1 °F	Normal

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. The long-range sea temperature isn't usable at this spot (the model's grid cell falls on land).

Castine climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Castine is from June to August: highs of 72 °F to 78 °F, about 9 rainy days a month and 7 hours of sunshine a day.

Tropical cyclones rarely pass near Castine: one within 93 mi in the last 30 years (1996–2025), Bertha, in July 1996.

32° 13°

JanJ
34° 15°

FebF
41° 23°

MarM
51° 34°

AprA
63° 43°

MayM
72° 51°

JunJ
78° 58°

JulJ
77° 57°

AugA
69° 50°

SepS
58° 41°

OctO
47° 32°

NovN
37° 22°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves
JanuaryJan	32°	13°	3.78 in	8	3.8	39°	2.8 ft
FebruaryFeb	34°	15°	3.51 in	7	5.1	35°	2.6 ft
MarchMar	41°	23°	3.91 in	9	6.0	35°	2.4 ft
AprilApr	51°	34°	4.64 in	9	6.3	40°	2.2 ft
MayMay	63°	43°	4.15 in	10	6.4	46°	1.7 ft
JuneJun	72°	51°	3.74 in	10	7.1	52°	1.6 ft
JulyJul	78°	58°	2.87 in	9	7.5	57°	1.4 ft
AugustAug	77°	57°	2.90 in	8	7.5	58°	1.4 ft
SeptemberSep	69°	50°	3.80 in	8	6.2	57°	1.6 ft
OctoberOct	58°	41°	5.40 in	9	4.1	54°	2.1 ft
NovemberNov	47°	32°	5.27 in	9	3.1	49°	2.5 ft
DecemberDec	37°	22°	5.43 in	10	2.7	44°	2.6 ft

Month	Water	Waves
Jan	39°	2.8 ft
Feb	35°	2.6 ft
Mar	35°	2.4 ft
Apr	40°	2.2 ft
May	46°	1.7 ft
Jun	52°	1.6 ft
Jul	57°	1.4 ft
Aug	58°	1.4 ft
Sep	57°	1.6 ft
Oct	54°	2.1 ft
Nov	49°	2.5 ft
Dec	44°	2.6 ft

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

A normal year brings 49.39 in of rain on about 105 days and about 2,000 hours of sunshine.

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

Now46 °Ffeels like 40 °F

Tomorrow48 / 62 °F

It's 46 °F now (feels like 40 °F). Today, 45 °F to 56 °F; tomorrow, 48 °F to 62 °F.

Chance of rain

Today 1%
Fri 30 29% 0.02 in
Sat 31 0%
Sun 1 0%
Mon 2 2%
Tue 3 17%
Wed 4 26% 0.04 in

Today the chance of rain reaches 1%. The next day with likely rain is Wednesday 4: 26% and 0.04 in.

No rain in the last 7 days.

Humidity and dew point

Humidity83%

Dew point41 °F

Humidity is 83% now and the dew point is 41 °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

Now10 migood

Clouds3%

Visibility is good now (10 mi). No fog expected today.

UV index

Now0

Today's peak3low

Fri 30: 2 · Sat 31: 2 · Sun 1: 2

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid 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

30.0030.50 29.83

Steady now (−0.01 inHg in 3 hours). It barely changes over the next 48 hours. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityGood · 24

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.

Day	Sky	Low / high	Max wind
Wed 28	Partly cloudy	30 / 49 °F	7 mph WSW
Tue 27	Clear sky	36 / 49 °F	11 mph NNW
Mon 26	Overcast	38 / 65 °F	12 mph W
Sun 25	Clear sky	36 / 64 °F	7 mph WSW
Sat 24	Clear sky	32 / 55 °F	7 mph NNW
Fri 23	Clear sky	37 / 51 °F	14 mph N
Thu 22	Overcast	41 / 56 °F	15 mph N

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Wed 21	Overcast	38 / 58 °F	0	9 mph NNE
Tue 20	Clear sky	37 / 61 °F	0	10 mph N
Mon 19	Overcast	40 / 56 °F	0	9 mph S
Sun 18	Clear sky	31 / 52 °F	0	8 mph SW
Sat 17	Overcast	35 / 54 °F	0	15 mph NW
Fri 16	Light rain	39 / 57 °F	0.63 in	13 mph S
Thu 15	Overcast	42 / 57 °F	0	13 mph NW
Wed 14	Heavy drizzle	49 / 63 °F	0.35 in	12 mph NW
Tue 13	Rain	41 / 48 °F	0.89 in	11 mph ENE
Mon 12	Drizzle	47 / 67 °F	0.14 in	13 mph NNW
Sun 11	Light drizzle	40 / 57 °F	0.01 in	11 mph SSW
Sat 10	Overcast	43 / 58 °F	0	12 mph NW
Fri 9	Light drizzle	46 / 62 °F	0.01 in	13 mph W
Thu 8	Light rain	50 / 64 °F	0.28 in	11 mph SW
Wed 7	Overcast	40 / 57 °F	0	11 mph SSW
Tue 6	Partly cloudy	46 / 57 °F	0	17 mph WNW
Mon 5	Light drizzle	49 / 62 °F	0.02 in	13 mph W
Sun 4	Overcast	43 / 62 °F	0	8 mph ESE
Sat 3	Overcast	49 / 64 °F	0	8 mph NNW
Fri 2	Light rain	54 / 76 °F	0.21 in	8 mph W
Thu 1	Overcast	53 / 68 °F	0	8 mph SSW
Wed 30	Overcast	54 / 64 °F	0	7 mph NW
Tue 29	Rain	56 / 59 °F	0.63 in	9 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 CastineQuestions

What's the weather like today in Castine?

Partly cloudy, from 45 °F to 56 °F, with a light breeze from the southwest (6 mph) and a 1% chance of rain.

Will it rain tomorrow in Castine?

On Friday 30 the chance of rain is 29% (0.02 in): drizzle.

How warm will it be this week?

Between a low of 35 °F and a high of 62 °F; the warmest day, Friday 30.

What's the UV index today?

It reaches 3 (low). No special protection needed.

Is the pressure rising or falling?

It's 30.20 inHg and steady: −0.27 inHg over the last 24 hours.

When is the best time to visit Castine?

The best time to visit Castine is from June to August: highs of 72 °F to 78 °F, about 9 rainy days a month and 7 hours of sunshine a day.

What is the weather like in Castine in October?

In October, Castine normally sees highs of 58 °F and lows of 41 °F, with about 9 rainy days (5.40 in for the month) and 4 hours of sunshine a day. The sea is around 54 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Castine?

The warmest is July, with average highs of 78 °F, and the coldest January, with lows of 13 °F. The wettest is December (5.43 in) and the driest, July.

More about Castine today

Weather near Castine

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 8.1 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 7:08 am (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from