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Grandma's Surf Forecast
/ HAW – Maui (46 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Grandma's surfForecast / HAW – Maui / USA
48hr Weather and Surf, issued 7 pm Friday 28 Nov 2025 HSTForecast update in hr min s Forecast update imminent
Grandma's surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Grandma's sea temperature is
26.1° C
(Which is slightly warmer than usual)How big are the waves at Grandma's today?
The current surf forecast for Grandma's at 2AM is: 0.4m 11s primary swell from a South-southeast direction (forecast issued at 07:00pm November 28). An open ocean swell of 0.7m 13s is not directed at the surf break, a second open ocean swell of 0.9m 8s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (29 Nov) | 1.5ft (0.5m) | 12s |
| Afternoon (29 Nov) | 1.5ft (0.4m) | 22s |
| Evening (29 Nov) | 4ft (1.2m) | 18s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 28 | Saturday 29 | Sunday 30 | Monday 01 | |||||||||||||||||||||
| 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 14 | 11 | 11 | 12 | 12 | 12 | 22 | 20 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 241 | 32 | 21 | 37 | 114 | 67 | 67 | 118 | 464 | 911 | 1112 | 1327 | 1358 | 1342 | 1312 | 1282 | 1165 | 1137 | 1017 | 991 | 886 | 783 | 683 | 623 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | glass | glass | glass | cross- on | glass | cross- off | cross- off | off | off | glass | glass | cross- on | cross | cross- off | glass | glass | glass | glass | glass | glass | glass |
High Tide / height (m) | 11:54PM 0.48 | 11:05AM 0.52 | 12:41AM 0.59 | 11:59AM 0.46 | 1:26AM 0.69 | 12:53PM 0.41 | ||||||||||||||||||
Low Tide / height (m) | 4:59PM 0.02 | 4:59AM 0.23 | 5:33PM -0.01 | 6:23AM 0.21 | 6:09PM -0.04 | 7:38AM 0.17 | ||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 01 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - | - | - | 6:46 | - | - |
| Sunset | 5:43 | - | - | - | - | - | - | - | 5:44 | - | - | - | - | - | - | - | 5:44 | - | - | - | - | - | - | - |
 |  | | | | | |  | | | | | | | | | | |  | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 26 | 25 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 24 | 23 | 22 | 23 | 23 | 25 | 25 | 25 | 24 | 23 | 23 | 23 | 23 | 25 | 25 |
| Feels °C (?) | 28 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 26 | 26 | 24 | 22 | 24 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 27 |
- 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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