As of 11:40 EDT

Weather in Castine, ME

46°Current weather

Castine, Saturday, 17 October, 11:40

Overcast. Feels like 42°. High 50°, low 35°.

Pressure30.00 inHg
Wind8 mph N
Humidity66%
Visibility6.2 mi
Dew point35°

Monthly outlook for Castine, ME: average high 55.7°, average low 41.3°. That is 2° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 1 November (66.9°), the coolest 18 October (31.6°).

55.7°/41.3°
Average high / low
+2°
Above normal
0 / 5
Wet days / normal
0.0 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
17 October – 26 October54.1°53.1°+0.5°
27 October – 5 November58.2°49.8°+4.7°
6 November – 15 Novemberat normal45.5°—

October records over 66 years

83.1°6 October 2025All-time high
25.7°31 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Swanville (13 mi).

Sun, 1851° / 32°0Clear
51 °Clear

Castine, Sunday, 18 October

Clear. High 51°, low 32°.

Pressure30.53 inHg
Wind5 mph S
Humidity46%
Visibility6.2 mi
Dew point27°
Mon, 1954° / 41°0Overcast
54 °Overcast

Castine, Monday, 19 October

Overcast. High 54°, low 41°.

Pressure30.45 inHg
Wind8.4 mph S
Humidity58%
Visibility6.2 mi
Dew point39°
Tue, 2056° / 41°0Overcast
56 °Overcast

Castine, Tuesday, 20 October

Overcast. High 56°, low 41°.

Pressure30.27 inHg
Wind12.8 mph N
Humidity47%
Visibility6.2 mi
Dew point35°
Wed, 2153° / 38°0Clear
53 °Clear

Castine, Wednesday, 21 October

Clear. High 53°, low 38°.

Pressure30.39 inHg
Wind8.9 mph N
Humidity61%
Visibility—
Dew point34°
Thu, 2258° / 35°0Clear
58 °Clear

Castine, Thursday, 22 October

Clear. High 58°, low 35°.

Pressure30.06 inHg
Wind11.9 mph N
Humidity53%
Visibility—
Dew point33°
Fri, 2355° / 41°0Clear
55 °Clear

Castine, Friday, 23 October

Clear. High 55°, low 41°.

Pressure30.15 inHg
Wind15.6 mph N
Humidity44%
Visibility—
Dew point28°
Sat, 2453° / 37°0Clear
53 °Clear

Castine, Saturday, 24 October

Clear. High 53°, low 37°.

Pressure30.50 inHg
Wind6.5 mph N
Humidity52%
Visibility—
Dew point31°
Sun, 2553° / 41°0Clear
53 °Clear

Castine, Sunday, 25 October

Clear. High 53°, low 41°.

Pressure30.45 inHg
Wind11.4 mph S
Humidity66%
Visibility—
Dew point39°
Mon, 2657° / 44°0Clear
57 °Clear

Castine, Monday, 26 October

Clear. High 57°, low 44°.

Pressure30.09 inHg
Wind9 mph S
Humidity70%
Visibility—
Dew point43°
Tue, 2753° / 40°0Overcast
53 °Overcast

Castine, Tuesday, 27 October

Overcast. High 53°, low 40°.

Pressure30.27 inHg
Wind12.2 mph N
Humidity47%
Visibility—
Dew point30°
Wed, 2854° / 41°0Overcast
54 °Overcast

Castine, Wednesday, 28 October

Overcast. High 54°, low 41°.

Pressure30.36 inHg
Wind12.6 mph S
Humidity63%
Visibility—
Dew point39°
Thu, 2959° / 52°0Overcast
59 °Overcast

Castine, Thursday, 29 October

Overcast. High 59°, low 52°.

Pressure30.09 inHg
Wind16 mph S
Humidity83%
Visibility—
Dew point51°
Fri, 3060° / 44°0Partly cloudy
60 °Partly cloudy

Castine, Friday, 30 October

Partly cloudy. High 60°, low 44°.

Pressure30.27 inHg
Wind11.5 mph NW
Humidity52%
Visibility—
Dew point37°
Sat, 3157° / 46°0Overcast
57 °Overcast

Castine, Saturday, 31 October

Overcast. High 57°, low 46°.

Pressure30.21 inHg
Wind11.8 mph S
Humidity73%
Visibility—
Dew point43°
Sun, 0167° / 53°0Overcast
67 °Overcast

Castine, Sunday, 1 November

Overcast. High 67°, low 53°.

Pressure29.85 inHg
Wind15.9 mph SW
Humidity86%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0249° / 39°0.17Climate normal
49 °Climate normal

Castine, Monday, 2 November

Climate normal for this date — 60-year average.

Average high49°
Average low39°
Average precipitation0.17 in
Chance of precipitation33%
Record high60° (2001)
Record low23° (2002)
Tue, 0349° / 38°0.24Climate normal
49 °Climate normal

Castine, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high49°
Average low38°
Average precipitation0.24 in
Chance of precipitation45%
Record high65° (2017)
Record low22° (2002)
Wed, 0449° / 38°0.07Climate normal
49 °Climate normal

Castine, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high49°
Average low38°
Average precipitation0.07 in
Chance of precipitation30%
Record high65° (1990)
Record low24° (2020)
Thu, 0549° / 38°0.15Climate normal
49 °Climate normal

Castine, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high49°
Average low38°
Average precipitation0.15 in
Chance of precipitation38%
Record high69° (2022)
Record low24° (1965)
Fri, 0648° / 38°0.15Climate normal
48 °Climate normal

Castine, Friday, 6 November

Climate normal for this date — 60-year average.

Average high48°
Average low38°
Average precipitation0.15 in
Chance of precipitation40%
Record high72° (2024)
Record low28° (1987)
Sat, 0748° / 37°0.05Climate normal
48 °Climate normal

Castine, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high48°
Average low37°
Average precipitation0.05 in
Chance of precipitation25%
Record high71° (2022)
Record low17° (2002)
Sun, 0846° / 35°0.11Climate normal
46 °Climate normal

Castine, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high46°
Average low35°
Average precipitation0.11 in
Chance of precipitation20%
Record high58° (1975)
Record low16° (2002)
Mon, 0946° / 35°0.12Climate normal
46 °Climate normal

Castine, Monday, 9 November

Climate normal for this date — 60-year average.

Average high46°
Average low35°
Average precipitation0.12 in
Chance of precipitation30%
Record high65° (2020)
Record low23° (1971)
Tue, 1046° / 35°0.14Climate normal
46 °Climate normal

Castine, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high46°
Average low35°
Average precipitation0.14 in
Chance of precipitation40%
Record high66° (2020)
Record low23° (1965)
Wed, 1146° / 36°0.11Climate normal
46 °Climate normal

Castine, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high46°
Average low36°
Average precipitation0.11 in
Chance of precipitation45%
Record high66° (2020)
Record low22° (2017)
Thu, 1245° / 34°0.14Climate normal
45 °Climate normal

Castine, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high45°
Average low34°
Average precipitation0.14 in
Chance of precipitation33%
Record high65° (2022)
Record low24° (1976)
Fri, 1343° / 33°0.17Climate normal
43 °Climate normal

Castine, Friday, 13 November

Climate normal for this date — 60-year average.

Average high43°
Average low33°
Average precipitation0.17 in
Chance of precipitation37%
Record high59° (1964)
Record low15° (2019)
Sat, 1443° / 32°0.11Climate normal
43 °Climate normal

Castine, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high43°
Average low32°
Average precipitation0.11 in
Chance of precipitation40%
Record high57° (2011)
Record low13° (1986)
Sun, 1544° / 33°0.15Climate normal
44 °Climate normal

Castine, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high44°
Average low33°
Average precipitation0.15 in
Chance of precipitation38%
Record high59° (1994)
Record low15° (2018)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Castine, ME are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Castine, ME since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.