Thumpertown Beach
Massachusetts · United States
Rating right now
Thumpertown Beach is a SW-facing sand beach on the James Bay coastline near Massachusetts — it picks up S–W swell and turns cleanest in a N–E wind, with the most consistent surf through april–october.
10-day forecast
Local time · updates hourly
Wave height & period
Wind
| Time | Rating | Waves | Swell | Wind | Air |
|---|---|---|---|---|---|
Water temperature by month
This month: ~18.6°C (65.5°F) on average
Jan
5.6°C
42.1°F · 3.3–7.7°C
Feb
3.9°C
39°F · 2.8–5.4°C
Mar
4.1°C
39.4°F · 1.9–6.1°C
Apr
6.3°C
43.3°F · 3.9–9.9°C
May
10.3°C
50.5°F · 7.5–14.9°C
Jun
15.2°C
59.4°F · 9.8–18.4°C
Jul
19.3°C
66.7°F · 16.2–22.7°C
Aug
20.4°C
68.7°F · 17.3–22.5°C
Sep
18.6°C
65.5°F · 15.4–21.5°C
Oct
14.6°C
58.3°F · 11–17.8°C
Nov
10.8°C
51.4°F · 8.8–14.5°C
Dec
7.9°C
46.2°F · 5.8–10.2°C
25-year monthly averages from the NOAA OISST satellite record — typical range min–max, not a live reading.
Know before you go
Best swell
S–W
Best wind
N–E
Break type
Beach break
Best season
April–October
Safety: Friendly by surf standards, but rip currents and drop-in etiquette still apply. Shifting sandbars create moving rip currents — learn to spot them and use them to get out back.
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