Nantucket weather by month & the best time to visit
🇺🇸 United States · seaside town · oceanic / maritime climate
The best time to visit Nantucket is July — its sunniest month (Sunshine Score 78/100), with August and September close behind. Nantucket averages about 2,196 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 72 mm of rain in July.
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- Sun hours / year
- 2,196
- Sunniest month
- July
- Peak score
- 78/100
- Rain / year
- 1,126 mm
- Snow / year
- ≈54 cm
- Midday UV at peak
- 7 (high)
- Sea at warmest
- 20°C / 68°F
- Population
- 7k
- Elevation
- 11 m
When is the best time to visit Nantucket?
For sunshine, the best time to visit Nantucket is July, then August and September. The dullest month is January (0/100, 91 mm of rain). The full month-by-month picture is in the table below.
How sunny is Nantucket?
Nantucket gets a moderate 2,196 hours of sunshine a year. 78 Sunshine Score points separate July (78) from January (0), so the month you pick matters. It ranks #321 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. The year's 1,126 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 4° / 39°F | 0° / 32°F | 91 mm | 1 | 6° / 43°F |
| February | 0 | 4° / 39°F | 0° / 32°F | 87 mm | 2 | 4° / 39°F |
| March | 0 | 5° / 41°F | 2° / 36°F | 106 mm | 3 | 5° / 41°F |
| April | 0 | 8° / 46°F | 6° / 43°F | 97 mm | 5 | 8° / 46°F |
| May | 25 | 12° / 54°F | 10° / 50°F | 86 mm | 6 | 12° / 54°F |
| June | 57 | 17° / 63°F | 15° / 59°F | 84 mm | 7 | 16° / 61°F |
| July | 78 | 21° / 70°F | 19° / 66°F | 72 mm | 7 | 19° / 66°F |
| August | 78 | 22° / 72°F | 20° / 68°F | 74 mm | 6 | 20° / 68°F |
| September | 68 | 19° / 66°F | 17° / 63°F | 95 mm | 5 | 20° / 68°F |
| October | 41 | 15° / 59°F | 13° / 55°F | 114 mm | 3 | 16° / 61°F |
| November | 18 | 11° / 52°F | 8° / 46°F | 106 mm | 2 | 12° / 54°F |
| December | 0 | 7° / 45°F | 3° / 37°F | 114 mm | 1 | 8° / 46°F |
Sea temperature in Nantucket by month
The sea off Nantucket is warmest in August at around 20°C / 68°F, and coolest in February at 4°C / 39°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Nantucket on the interactive sunshine globe →
Nearby places for sunshine
- Martha's Vineyard United States · 49 km · best in Jul · 2,196 h sun/yr
- Providence/Warwick United States · 125 km · best in Aug · 2,279 h sun/yr
- Boston United States · 146 km · best in Jul · 2,157 h sun/yr
- Manchester (New Hampshire) United States · 219 km · best in Sep · 2,158 h sun/yr
- Hartford United States · 231 km · best in May · 2,192 h sun/yr
- New Haven United States · 236 km · best in May · 2,191 h sun/yr
Nearest destinations
- Hyannis United States · 50 km · 2,197 h sun/yr · best in Jul
- New Bedford United States · 88 km · 2,197 h sun/yr · best in Jul
- Newport United States · 106 km · 2,279 h sun/yr · best in Aug
- Block Island United States · 127 km · 2,278 h sun/yr · best in Jul
Head-to-head
How Nantucket compares month by month: Nantucket vs Boston · Nantucket vs Providence/Warwick · Nantucket vs Martha's Vineyard · Nantucket vs Hamilton (Bermuda) · all comparisons
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