The best times to visit Swansea for ideal weather are

May 7th to October 21st

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



Other Swansea Travel Info

Weather in Swansea


Average temperatures in Swansea vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is more temperate than most — in the 61st 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 Swansea, 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 82.9°F (28.3°C) with temperatures rarely dropping below 68.7°F (20.4°C) at night.

Swansea Temperatures (Fahrenheit)


Swansea 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.

Swansea Perceived Temperature (F)


Swansea Perceived Temperature (C)



Average Swansea 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 37.3 30.2 24.3
Feb 38.2 30.4 24.1
Mar 45.6 37.5 31.1
Apr 57.6 49.2 42.5
May 66 57.6 50.9
Jun 74.1 66.2 59.6
Jul 80.9 73.3 67
Aug 79.1 71.3 64.5
Sep 73 65.5 59
Oct 62.3 55.3 49.2
Nov 51.7 45.1 39.6
Dec 43.7 37.1 31.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 2.9 -1 -4.3
Feb 3.4 -0.9 -4.4
Mar 7.6 3.1 -0.5
Apr 14.2 9.6 5.8
May 18.9 14.2 10.5
Jun 23.4 19 15.3
Jul 27.2 22.9 19.4
Aug 26.2 21.8 18.1
Sep 22.8 18.6 15
Oct 16.8 12.9 9.6
Nov 10.9 7.3 4.2
Dec 6.5 2.8 -0.1


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 Swansea.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 0% 0 0
Feb 0% 0 0
Mar 0% 0 0
Apr 0% 0 0
May 0% 0 0
Jun 0% 0 0
Jul 0% 0 0
Aug 0% 0 0
Sep 0% 0 0
Oct 0% 0 0
Nov 0% 0 0
Dec 0% 0 0

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 0 0 0
Feb 0 0 0
Mar 0 0 0
Apr 0 0 0
May 0 0 0
Jun 0 0 0
Jul 0 0 0
Aug 0 0 0
Sep 0 0 0
Oct 0 0 0
Nov 0 0 0
Dec 0 0 0


Humidity and Wind

Swansea has some very humid months, with other comfortably humid months. The least humid month is March (55.2% relative humidity), and the most humid month is July (75.3%).

Wind in Swansea is usually calm. The windiest month is March, followed by February and November. March’s average wind speed of around 8.2 knots (9.5 MPH or 15.2 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early March where average top sustained speeds reach 14.1 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 7.5 Gentle breeze 12.4 Significant breeze
Feb 8 Gentle breeze 13.2 Significant breeze
Mar 8.2 Gentle breeze 13.4 Significant breeze
Apr 7.7 Gentle breeze 12.7 Significant breeze
May 6.5 Light breeze 10.8 Significant breeze
Jun 5.5 Light breeze 9.8 Gentle breeze
Jul 4.9 Light breeze 8.9 Significant breeze
Aug 4.9 Light breeze 8.6 Gentle breeze
Sep 6.1 Light breeze 10.3 Significant breeze
Oct 7.3 Gentle breeze 11.8 Significant breeze
Nov 7.9 Gentle breeze 12.6 Significant breeze
Dec 7.9 Gentle breeze 12.5 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 57.5%
Feb 57.9%
Mar 55.2%
Apr 60.1%
May 69.1%
Jun 73.8%
Jul 75.3%
Aug 72.1%
Sep 73.2%
Oct 69.3%
Nov 62.3%
Dec 68.4%


Is it Safe to Travel to Swansea?

Our best data indicates this area is generally safe. As of Oct 07, 2019 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 Sep 23, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Swansea, MA, US is July, followed by June and August. 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 Swansea in January. 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 slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 51.4 in January means 51.4% of the tourists vs. July.



Overall Swansea Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 71.5°F (21.9°C) and 38.8°F (3.8°C) with warmer temperatures in the later months. 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. June – August is the busiest season for tourism in Swansea, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 77.5°F (25.3°C) and 47.3°F (8.5°C), which will feel comfortable given the humidity and wind. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Swansea to be enjoyable for warm weather travelers. The average high during this season is between 44.7°F (7.1°C) and 34.6°F (1.4°C). These times of year are fairly slow with tourists.


Best Times to Travelthe United States › Swansea, MA, US