Grand Marias surf forecast from 11 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 11AM (local time) - 10ft (3.0m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 15 Sep, 11AM (local time) - 10ft (3.0m), 8s period, WSW swell with 1,114 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 11AM (local time) - 10ft (3.0m), 8s period with WSW swell.
Best Forecast Surf Conditions for Grand Marias this week:
The surf forecast for Grand Marias over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 15) at 11AM. The primary swell is predicted to be 3.0m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Grand Marias in the next 16 days are 3.0m 8s and forecast to arrive on Tuesday (Sep 15) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 7s period and expected on Tuesday (Sep 15) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Tue 15th Sep) | 10ft (3.0m) 8s |
| Best Surf | 11AM (Tue 15th Sep) | 10ft (3.0m) 8s |
| Most Powerful | 11AM (Tue 15th Sep) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Grand Marias over the next 16 days.
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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