The best times to visit Boothbay Harbor for ideal weather are

May 21st to September 30th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Boothbay Harbor Travel Info

Weather in Boothbay Harbor


Average temperatures in Boothbay Harbor vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 25th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Boothbay Harbor, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 80.7°F (27.1°C) with temperatures rarely dropping below 59.8°F (15.4°C) at night.

Boothbay Harbor Temperatures (Fahrenheit)


Boothbay Harbor Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Boothbay Harbor Perceived Temperature (F)


Boothbay Harbor Perceived Temperature (C)



Average Boothbay Harbor Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 32.7 22.4 12.1
Feb 34 23.8 13.4
Mar 43.1 32.9 23.4
Apr 55.4 44.2 34.1
May 66.6 54.6 44
Jun 73 62.1 52.4
Jul 79.7 68.8 58.8
Aug 78.3 67.2 57.2
Sep 71.7 60.3 49.9
Oct 60.1 49.6 40
Nov 49.1 38.8 29.7
Dec 38.4 29.3 20.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 0.4 -5.3 -11.1
Feb 1.1 -4.6 -10.3
Mar 6.2 0.5 -4.8
Apr 13 6.8 1.2
May 19.2 12.6 6.7
Jun 22.8 16.7 11.3
Jul 26.5 20.4 14.9
Aug 25.7 19.6 14
Sep 22.1 15.7 9.9
Oct 15.6 9.8 4.4
Nov 9.5 3.8 -1.3
Dec 3.6 -1.5 -6.2



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Boothbay Harbor are August, September, and then January. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid to late August. For example, on the week of August 20th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in late December with an average of 3 days of significant precipitation the week of December 24th.

When can you find snow in Boothbay Harbor? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Boothbay Harbor.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Boothbay Harbor (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 22% 0 3
Feb 24% 0 3.1
Mar 24% 0 4
Apr 23% 0 3.4
May 24% 0 3.4
Jun 31% 0 5.9
Jul 24% 0 4.4
Aug 20% 0 3.6
Sep 21% 0 4.3
Oct 25% 0 5.7
Nov 23% 0 4.5
Dec 33% 0 5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 22 0 7.6
Feb 24 0 7.9
Mar 24 0 10.2
Apr 23 0 8.6
May 24 0 8.6
Jun 31 0 15
Jul 24 0 11.2
Aug 20 0 9.1
Sep 21 0 10.9
Oct 25 0 14.5
Nov 23 0 11.4
Dec 33 0 12.7


Humidity and Wind

Boothbay Harbor has some very humid months, with other comfortably humid months. The least humid month is March (50.5% relative humidity), and the most humid month is August (71.4%).

Wind in Boothbay Harbor is usually extremely calm. The windiest month is March, followed by April and February. March’s average wind speed of around 3.9 knots (4.4 MPH or 7.1 KPH) is considered “light air.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid April where average top sustained speeds reach 10 knots, which is considered a gentle breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Boothbay Harbor.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 2.9 Barely noticeable 8.2 Gentle breeze
Feb 3.4 Barely noticeable 8.8 Gentle breeze
Mar 3.9 Barely noticeable 9.4 Gentle breeze
Apr 3.7 Barely noticeable 9.4 Gentle breeze
May 3.3 Barely noticeable 8.8 Gentle breeze
Jun 2.8 Barely noticeable 8 Gentle breeze
Jul 2.5 Barely noticeable 7.7 Gentle breeze
Aug 2.3 Barely noticeable 7.4 Gentle breeze
Sep 2.4 Barely noticeable 7.7 Gentle breeze
Oct 2.7 Barely noticeable 8 Gentle breeze
Nov 2.8 Barely noticeable 8.1 Gentle breeze
Dec 2.8 Barely noticeable 8 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 55.2%
Feb 51.9%
Mar 50.5%
Apr 54%
May 60.9%
Jun 68.3%
Jul 70.3%
Aug 71.4%
Sep 69.8%
Oct 67.9%
Nov 63.4%
Dec 65.7%


Is it Safe to Travel to Boothbay Harbor?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Boothbay Harbor, ME, US is July, followed by August and June. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Boothbay Harbor in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 51.6 in December means 51.6% of the tourists vs. July.



Overall Boothbay Harbor Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 70.6°F (21.4°C) and 36°F (2.2°C) with far warmer temperatures in the later months. Rain is somewhat common with 7 to 8 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see moderate precipitation with 6 to 9 days of precipitation per month. June – August is the busiest season for tourism in Boothbay Harbor, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 76.5°F (24.7°C) and 44.3°F (6.8°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 6 to 8 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is far too cold this time of year in Boothbay Harbor to be enjoyable for warm weather travelers. The average high during this season is between 40.8°F (4.9°C) and 29.2°F (-1.6°C). On average, it rains or snows a fair amount: 7 to 10 times per month. These times of year are the slowest with tourists.


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