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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 am Sunday 31 May 2026 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
25.4° C
(Which is normal for this time of year)How big are the waves at Grandma's today (31 May):
- Morning surf: Morning surf (31 May, local time) - 2.5ft (0.8m), 15s period with SSW swell.
- Afternoon surf: Afternoon surf (31 May, local time) - 2.5ft (0.7m), 15s period with SSW swell.
- Evening surf: Evening surf (31 May, local time) - 2.5ft (0.7m), 14s period with SSW swell.
The current surf forecast for Grandma's at 2PM is: 0.7m 15s primary swell from a South-southwest direction and 0.3m 11s secondary swell from a South direction (forecast issued at 07:00am May 31). An open ocean swell of 0.4m 9s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 May) | 2.5ft (0.8m) | 15s |
| Afternoon (31 May) | 2.5ft (0.7m) | 15s |
| Evening (31 May) | 2.5ft (0.7m) | 14s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 6mm), mostly falling on Tue afternoon. Warm (max 27°C on Tue afternoon, min 23°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Sunday 31 | Monday 1 | Tuesday 2 | Wed 3 | |||||||||||||||||||||
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 | 5 PM | 8 PM | 11 PM | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 18 | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 20 | S 16 | SSW 19 | S 16 | SSW 18 | S 15 | SSW 18 | SSW 18 | |
320 | 304 | 231 | 225 | 218 | 215 | 215 | 215 | 213 | 260 | 329 | 418 | 413 | 315 | 372 | 568 | 395 | 522 | 497 | 516 | 929 | 465 | 547 | 540 | |
Wind (km/h) | ||||||||||||||||||||||||
off | cross-off | glassy | glassy | off | cross-off | cross-off | cross-off | off | off | cross-off | glassy | cross-off | cross-off | off | cross-off | cross-off | glassy | glassy | glassy | glassy | glassy | cross-off | cross-off | |
High Tide | 3:47AM0.24m | 4:38PM0.75m | 4:31AM0.23m | 5:16PM0.75m | 5:17AM0.22m | 5:55PM0.73m | ||||||||||||||||||
Low Tide | 8:59AM-0.04m | 11:43PM0.09m | 9:36AM-0.02m | 00:25AM0.08m | 10:15AM-0.00m | 1:07AM0.08m | ||||||||||||||||||
 |  |  | | | | | | | | | |  |  | | | | | | | |  | | | |
 | 5:43 | — | — | — | — | — | — | — | 5:43 | — | — | — | — | — | — | — | 5:43 | — | — | — | — | — | — | 5:43 |
 | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — | 7:04 |
— | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | 2 | 1 | 1 | — | |
Temp °C | 23 | 24 | 26 | 26 | 26 | 25 | 24 | 23 | 23 | 25 | 26 | 26 | 26 | 25 | 24 | 24 | 24 | 25 | 26 | 27 | 26 | 26 | 25 | 24 |
25 | 26 | 29 | 29 | 28 | 26 | 26 | 24 | 24 | 26 | 28 | 28 | 28 | 27 | 26 | 26 | 27 | 28 | 29 | 31 | 30 | 30 | 28 | 27 | |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | S 16 | SSW 16 | S 16 | SSW 18 | S 15 | SSW 18 | SSW 18 |
 kJ | 320 | 304 | 231 | 225 | 218 | 215 | 215 | 215 | 213 | 158 | 329 | 418 | 413 | 315 | 372 | 568 | 341 | 522 | 421 | 516 | 929 | 465 | 547 | 540 |
Swell 2 Height (m) Direction Period (s) | SSE 11 | N 9 | S 11 | S 11 | S 11 | N 9 | S 19 | SSW 19 | SSW 19 | SSW 18 | SSW 14 | SSW 13 | S 13 | S 13 | S 13 | S 13 | SSW 20 | SSW 19 | SSW 19 | SSW 19 | N 12 | SSW 18 | S 15 | S 14 |
| kJ | 23 | 15 | 20 | 20 | 20 | 25 | 192 | 212 | 207 | 260 | 152 | 141 | 87 | 126 | 126 | 121 | 395 | 502 | 497 | 387 | 69 | 427 | 343 | 338 |
Swell 3 Height (m) Direction Period (s) | NNE 8 | SSE 11 | N 8 | SSW 21 | SSW 21 | SSW 20 | N 9 | N 11 | SE 8 | N 10 | N 10 | N 10 | N 10 | S 21 | SSW 21 | N 9 | S 13 | N 9 | N 9 | E 7 | NNW 12 | NNW 11 | N 11 | N 10 |
| kJ | 13 | 23 | 12 | 44 | 86 | 128 | 14 | 21 | 3 | 31 | 17 | 17 | 30 | 233 | 258 | 25 | 121 | 14 | 14 | 52 | 28 | 41 | 61 | 55 |
Wind waves Height (m) Direction Period (s) | — | — | — | N 9 | NNE 9 | — | E 8 | — | N 10 | — | — | — | E 8 | N 9 | ENE 6 | E 5 | E 7 | E 7 | E 7 | N 12 | E 4 | E 5 | E 6 | E 6 |
| kJ | — | — | — | 25 | 26 | — | 124 | — | 32 | — | — | — | 117 | 28 | 6 | 90 | 150 | 104 | 82 | 73 | 36 | 120 | 112 | 148 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
Best forecast wave conditions in Maui | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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