Autumn is the answer residents give, and October is the specific month they mean.
Why October is the best month here
Every other month gets you one thing or the other. April and May have the good air and cold water. July and August have warm water and air you cannot escape from. October is the short window where both work at once: 80.1°F afternoons, a 76.0°F ocean still holding summer heat, the humidity broken, and 4.97″ of rain across about 5.2 wet days — half of September's.
The schools have gone back and rates drop after Labor Day, so the beach is quiet as well.
The sea lags the air by about two months in both directions, which is why this happens. See water temperature by month.
Then November, which is different and also excellent
November is the driest month of the year at 1.87″ across about 3.7 wet days, with 72.4°F afternoons and the light going gold by four. It is the best walking month on the island. The water has dropped to 70.4°F and is past comfortable for most people, so it stops being a swimming season and becomes a trails-and-town one.
Right whale season opens again in mid-November, and the Right Whale Festival marks it.
What autumn is for
Swimming in warm water under dry air — October only.
Kayaking and birding once the humidity breaks. Insects are still around near the marsh into October; bring repellent.
Cycling the flat paved trail and the firm beach sand at low tide.
The festival calendar, which is at its fullest: the Jazz Festival, Island Hop, Pétanque and the Right Whale Festival all fall in this stretch. We publish no dates we have not confirmed with the organiser, so check the event page.
The fort and the Greenway at their second peak of the year.
What to expect from the weather
|
Average high |
Average low |
Rain |
Ocean |
| September |
86.0°F |
73.2°F |
7.19″ |
82.4°F |
| October |
80.1°F |
65.3°F |
4.97″ |
76.0°F |
| November |
72.4°F |
56.1°F |
1.87″ |
70.4°F |
September, and its asterisk
September is the best-value month on paper: 82.4°F water, thin crowds, big rate drops after Labor Day. It is also the wettest month of the year and the statistical peak of the Atlantic hurricane season. Plenty of people take that trade knowingly. Take it with a refundable rate and watch the National Hurricane Center rather than a forecast app — see our hurricane season guide.
Hurricane season formally closes on 30 November. Sea turtle nesting season closes at the end of October.