TidePlanet

Weather in Southwest Harbor

14-day forecast · updated today, Thursday, October 29, at 3:12 am (EDT)
Now · clear 42 °F
Feels like
37 °F
Low / high
41 / 57 °F
Rain
4%
Wind
3 mph WSW
↘ 30.22 inHg · falling

Today in Southwest Harbor: mainly clear, 41 °F to 57 °F, with a 4% chance of rain and a light air from the west-southwest (3 mph). Tomorrow, light drizzle, 47 °F to 64 °F and a 29% chance of rain. The warmest day of the week is Friday 30, at 64 °F.

Measured now at the airport

Bar Harbor/Hancock Cnty (KBHB), 12 mi away · 16 min ago

Visibility9.9 mi or more
WeatherNothing to note
Temperature40 °F
Wind3 mph from the west-southwest

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 · 29 Mainly clear 41 / 57 °F 4% 14 mph SW 3.3 ft 1:12 am · 1:25 pm HRRR + NBM
Fri 30 Light drizzle 47 / 64 °F 29% · 0.07 in 14 mph W 3.2 ft 2:05 am · 2:19 pm NBM
Sat 31 Mainly clear 38 / 50 °F 0% 12 mph NW 1.8 ft 3:04 am · 3:20 pm NBM
Sun 1 Mainly clear 35 / 53 °F 0% 11 mph WSW 1.6 ft 3:07 am · 3:26 pm NBM
Mon 2 Overcast 44 / 59 °F 5% 11 mph WSW 1.6 ft 4:15 am · 4:36 pm NBM
Tue 3 Overcast 42 / 54 °F 11% 9 mph NE 1.6 ft 5:22 am · 5:45 pm NBM
Wed 4 Overcast 43 / 55 °F 20% · 0.05 in 11 mph S 3.8 ft 6:25 am · 6:50 pm NBM
Thu 5 Overcast 45 / 57 °F 33% · 0.58 in 12 mph S 2.1 ft 7:22 am · 7:49 pm NBM
Fri 6 Overcast 47 / 58 °F 42% · 1.09 in 13 mph S 3.7 ft 8:13 am · 8:41 pm NBM
Sat 7 Light rain 44 / 54 °F 35% · 0.83 in 11 mph NNW 4.7 ft 8:59 am · 9:29 pm NBM
Sun 8 Drizzle 38 / 53 °F 22% · 0.14 in 11 mph NW 3.8 ft 9:41 am · 10:13 pm NBM + ECMWF
Mon 9 Mainly clear 37 / 52 °F 25% 8 mph NW 1.9 ft 10:21 am · 10:54 pm ECMWF
Tue 10 Partly cloudy 35 / 49 °F 18% 5 mph N 1.4 ft 10:59 am · 11:34 pm ECMWF
Wed 11 Overcast 39 / 51 °F 18% 8 mph S 1.6 ft 11:37 am ECMWF

Each hour comes from the best model for this spot: HRRR until Thursday 29 10:00 pm; then NBM until Sunday 8 8:00 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 ClearClearClearClear skyClear skyClear skyClearMainly clear
Temperature 41°42°43°49°56°56°52°53°
Chance of rain 1%1%1%0%0%0%0%1%
Rain 0.00 in0.00 in0.00 in0.00 in0.00 in0.00 in0.00 in0.00 in
Wind (mph) 1 WSW3 WSW3 SSW4 SSW12 SW13 SW10 SW10 SW
Humidity 70%73%77%83%76%80%87%81%
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) TodayFri 30Sat 31Sun 1Mon 2Tue 3Wed 4
ECMWF 56°60°47°52°58°56°58°
AIFS 60°62°47°51°60°63°67°
GFS 56°64°48°53°60°53°52°
ICON 57°62°49°50°58°53°56°
HRRR 57°61°—————
NBM 59°64°50°53°59°54°55°
Confidence highhighhighhighhighhighmedium
Do the models agree? · Rain
Rain TodayFri 30Sat 31Sun 1Mon 2Tue 3Wed 4
ECMWF 00.07 in00000
AIFS 0.01 in0.06 in000.04 in0.05 in0.03 in
GFS 00.16 in00000
ICON 00.03 in000.01 in00.01 in
HRRR 00.09 in—————
NBM 00.07 in00000.05 in
Confidence highhighhighhighhighhighhigh
Do the models agree? · Wind
Wind (mph) TodayFri 30Sat 31Sun 1Mon 2Tue 3Wed 4
ECMWF 1219112012238188189131528
AIFS 12131310965
GFS 1733203220271114102111231118
ICON 1328142916331123112210191123
HRRR 13321533—————
NBM 152814261221111811179121117
Confidence highhighhighhighhighhighhigh

Chance of rain from the ensemble models

Model TodayFri 30Sat 31Sun 1Mon 2Tue 3Wed 4
ECMWF (51 scenarios) 0%71%0%0%6%20%35%
GFS (GEFS, 31 scenarios) 0%90%3%0%0%19%39%
NBM (NOAA) 4%29%0%0%5%11%20%
Thunderstorm (NBM) 0%0%0%0%0%0%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 near-normal sea.

Next 6 weeks

When TemperatureTemp. Rain Sea Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8 Above +2.9 °F Normal Normal −0.4 °F —
Nov 9 – Nov 15Nov 9–Nov 15 A bit above +1.1 °F Normal Normal +0.4 °F —
Nov 16 – Nov 22Nov 16–Nov 22 A bit above +2.0 °F A bit below −23% A bit above +0.5 °F 46° / 42°
Nov 23 – Nov 29Nov 23–Nov 29 A bit above +2.3 °F A bit above +24% A bit above +0.9 °F 44° / 41°
Nov 30 – Dec 6Nov 30–Dec 6 A bit above +2.2 °F A bit above +20% A bit above +1.1 °F 42° / 38°

Coming months

When TemperatureTemp. Rain Sea
November A bit above +1.4 °F Normal A bit above +0.7 °F
December Above +3.6 °F A bit above +22% A bit above +1.6 °F
January Above +5.0 °F A bit above +32% Above +3.1 °F
February Above +4.1 °F Normal Well above +3.6 °F
March Above +3.6 °F Normal Above +3.2 °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.

Southwest Harbor climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Southwest Harbor is from June to August: highs of 71 °F to 78 °F, about 9 rainy days a month and 7 hours of sunshine a day.

Tropical cyclones rarely pass near Southwest Harbor: 2 within 93 mi in the last 30 years (1996–2025), most recently Arthur, in July 2014.

Month High Low Rain Rainy daysDays Sun (h/day) Water Waves
JanuaryJan 30° 13° 4.97 in 9 3.9 42° 5.3 ft
FebruaryFeb 33° 14° 4.18 in 8 5.1 39° 5.1 ft
MarchMar 40° 23° 4.80 in 9 5.9 38° 4.7 ft
AprilApr 50° 34° 5.17 in 10 6.2 40° 4.3 ft
MayMay 62° 43° 4.38 in 10 6.4 44° 3.2 ft
JuneJun 71° 51° 4.23 in 10 7.0 50° 2.9 ft
JulyJul 78° 58° 3.12 in 9 7.5 55° 2.7 ft
AugustAug 76° 57° 2.83 in 8 7.4 57° 2.6 ft
SeptemberSep 68° 50° 4.32 in 8 6.1 56° 3.3 ft
OctoberOct 57° 42° 5.98 in 9 4.1 53° 4.1 ft
NovemberNov 47° 32° 6.17 in 9 3.0 49° 4.7 ft
DecemberDec 37° 21° 5.98 in 11 2.7 46° 4.9 ft
Month Water Waves
Jan 42° 5.3 ft
Feb 39° 5.1 ft
Mar 38° 4.7 ft
Apr 40° 4.3 ft
May 44° 3.2 ft
Jun 50° 2.9 ft
Jul 55° 2.7 ft
Aug 57° 2.6 ft
Sep 56° 3.3 ft
Oct 53° 4.1 ft
Nov 49° 4.7 ft
Dec 46° 4.9 ft

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

A normal year brings 56.13 in of rain on about 110 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

Now42 °Ffeels like 37 °F
Tomorrow47 / 64 °F

It's 42 °F now (feels like 37 °F). Today, 41 °F to 57 °F; tomorrow, 47 °F to 64 °F.

Chance of rain

  • Today 4%
  • Fri 30 29% 0.07 in
  • Sat 31 0%
  • Sun 1 0%
  • Mon 2 5%
  • Tue 3 11%
  • Wed 4 20% 0.05 in

Today the chance of rain reaches 4%. The next day with likely rain is Friday 30: 29% and 0.07 in.

No rain in the last 7 days.

Humidity and dew point

Humidity73%
Dew point34 °F

Humidity is 73% now and the dew point is 34 °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

Now9.5 migood
Clouds0%

Visibility is good now (9.5 mi). No fog expected today.

UV index

Now0
Today's peak3low

Fri 30: 2 · Sat 31: 2 · Sun 1: 2

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 Anglers expect normal activity
  • ↘ Falling · now Anglers say fish feed more before the change

Falling now (−0.05 inHg in 3 hours). Over the next 48 hours: −0.12 inHg. Falling pressure: anglers say fish feed more before the change. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityGood · 28
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
Wed 28 Overcast33 / 47 °F07 mph WSW
Tue 27 Mainly clear38 / 48 °F010 mph NNW
Mon 26 Overcast41 / 64 °F011 mph W
Sun 25 Clear sky38 / 62 °F07 mph WSW
Sat 24 Clear sky34 / 54 °F07 mph NW
Fri 23 Clear sky40 / 50 °F013 mph N
Thu 22 Overcast43 / 55 °F013 mph N
Show all 30 days
DaySkyLow / highRainMax wind
Wed 21 Overcast40 / 56 °F09 mph NE
Tue 20 Overcast39 / 59 °F010 mph N
Mon 19 Mainly clear41 / 55 °F07 mph S
Sun 18 Clear sky34 / 51 °F06 mph WSW
Sat 17 Overcast38 / 55 °F014 mph NW
Fri 16 Light rain40 / 58 °F0.56 in12 mph S
Thu 15 Overcast44 / 56 °F012 mph NW
Wed 14 Light rain49 / 60 °F0.45 in12 mph NNW
Tue 13 Rain40 / 49 °F0.84 in12 mph ENE
Mon 12 Drizzle46 / 64 °F0.15 in12 mph NW
Sun 11 Overcast41 / 56 °F010 mph SSW
Sat 10 Overcast46 / 56 °F012 mph WNW
Fri 9 Partly cloudy47 / 61 °F013 mph W
Thu 8 Heavy drizzle53 / 62 °F0.21 in12 mph SW
Wed 7 Overcast41 / 56 °F09 mph SW
Tue 6 Partly cloudy47 / 56 °F016 mph WNW
Mon 5 Light drizzle50 / 62 °F0.02 in12 mph W
Sun 4 Overcast45 / 60 °F08 mph ESE
Sat 3 Overcast51 / 62 °F08 mph NNW
Fri 2 Drizzle55 / 72 °F0.14 in9 mph WSW
Thu 1 Overcast53 / 67 °F07 mph SSW
Wed 30 Overcast55 / 63 °F06 mph NW
Tue 29 Rain55 / 58 °F1.28 in8 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 Southwest HarborQuestions

What's the weather like today in Southwest Harbor?

Mainly clear, from 41 °F to 57 °F, with a light air from the west-southwest (3 mph) and a 4% chance of rain.

Will it rain tomorrow in Southwest Harbor?

On Friday 30 the chance of rain is 29% (0.07 in): light drizzle.

How warm will it be this week?

Between a low of 35 °F and a high of 64 °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 30.22 inHg and falling: −0.21 inHg over the last 24 hours.

When is the best time to visit Southwest Harbor?

The best time to visit Southwest Harbor is from June to August: highs of 71 °F to 78 °F, about 9 rainy days a month and 7 hours of sunshine a day.

What is the weather like in Southwest Harbor in October?

In October, Southwest Harbor normally sees highs of 57 °F and lows of 42 °F, with about 9 rainy days (5.98 in for the month) and 4 hours of sunshine a day. The sea is around 53 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Southwest Harbor?

The warmest is July, with average highs of 78 °F, and the coldest January, with lows of 13 °F. The wettest is November (6.17 in) and the driest, August.

More about Southwest Harbor today

Weather near Southwest Harbor

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 16 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 3:12 am (local time).

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