Martinelli Beach
Massachusetts · United States
Rating right now
Martinelli Beach is a NW-facing sand beach on the James Bay coastline near Massachusetts — it picks up W–N swell and turns cleanest in a E–S 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: ~20°C (68°F) on average
Jan
5.5°C
41.9°F · 2.3–8.4°C
Feb
3.4°C
38.1°F · 1.6–5.9°C
Mar
3.9°C
39°F · 0.3–7°C
Apr
7.1°C
44.8°F · 3.6–11.2°C
May
11.3°C
52.3°F · 8.5–16.4°C
Jun
16.2°C
61.2°F · 10.3–19.2°C
Jul
20.2°C
68.4°F · 17.1–23.4°C
Aug
21.4°C
70.5°F · 18–25°C
Sep
20°C
68°F · 16.9–22.5°C
Oct
16.4°C
61.5°F · 13.4–19.6°C
Nov
12.3°C
54.1°F · 9.7–16.2°C
Dec
8.5°C
47.3°F · 6–10.8°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
W–N
Best wind
E–S
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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