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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 Sunday 17 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
25.3° C
(Which is normal for this time of year)How big are the waves at Grandma's today?
The current surf forecast for Grandma's at 10PM is: 0.6m 15s primary swell from a South-southwest direction and 0.4m 21s secondary swell from a Southwest direction (forecast issued at 07:00pm May 17). An open ocean swell of 1.7m 8s 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 (17 May) | - | - |
| Afternoon (17 May) | 1.5ft (0.5m) | 15s |
| Evening (17 May) | 2ft (0.6m) | 15s |
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 3mm), mostly falling on Mon afternoon. Warm (max 27°C on Mon morning, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wed 20 | |||||||||||||||||||||
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 | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SW 19 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 18 | SSW 18 | SSW 15 | SSW 17 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | |
146 | 146 | 142 | 140 | 118 | 136 | 183 | 186 | 108 | 105 | 104 | 105 | 170 | 121 | 121 | 121 | 264 | 169 | 174 | 158 | 158 | 160 | 116 | 111 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | glassy | cross-off | off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | glassy | glassy | off | off | off | cross-off | off | off | off | off | |
High Tide | 5:04PM0.84m | 5:03AM0.22m | 5:54PM0.84m | 6:05AM0.21m | 6:47PM0.80m | 7:16AM0.21m | ||||||||||||||||||
Low Tide | 00:10AM0.04m | 10:15AM-0.09m | 1:09AM0.04m | 11:03AM-0.05m | 2:09AM0.03m | 11:56AM0.00m | ||||||||||||||||||
 |  |  | | |  |  |  | | | | | | | | | | | | | | | | | |
 | — | — | — | — | 5:47 | — | — | — | — | — | — | — | 5:47 | — | — | — | — | — | — | — | 5:47 | — | — | — |
 | 6:57 | — | — | — | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — | 6:58 |
1 | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | |
Temp °C | 27 | 26 | 25 | 24 | 24 | 25 | 27 | 26 | 26 | 24 | 24 | 24 | 23 | 25 | 26 | 26 | 26 | 24 | 24 | 23 | 23 | 24 | 26 | 26 |
30 | 29 | 28 | 27 | 26 | 27 | 30 | 29 | 27 | 25 | 26 | 26 | 25 | 27 | 29 | 29 | 27 | 25 | 25 | 24 | 24 | 24 | 27 | 26 | |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 17 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 |
 kJ | 146 | 146 | 142 | 140 | 118 | 136 | 183 | 186 | 108 | 105 | 104 | 105 | 170 | 113 | 115 | 121 | 264 | 169 | 174 | 158 | 158 | 160 | 116 | 111 |
Swell 2 Height (m) Direction Period (s) | SSE 7 | SW 21 | SW 21 | ESE 7 | SSE 6 | SSE 6 | SW 19 | SW 19 | SW 19 | ESE 6 | SE 6 | SSW 16 | SE 10 | SSW 18 | SSW 18 | SW 18 | NNW 11 | SE 6 | SE 6 | SE 6 | NNW 11 | NNW 10 | SE 6 | SE 6 |
| kJ | 9 | 117 | 117 | 9 | 8 | 7 | 96 | 184 | 96 | 8 | 9 | 52 | 33 | 121 | 121 | 80 | 13 | 6 | 5 | 9 | 22 | 20 | 9 | 9 |
Swell 3 Height (m) Direction Period (s) | SW 21 | S 6 | SSE 6 | S 6 | ESE 7 | ESE 8 | E 8 | SSE 6 | SSW 16 | SSW 16 | SSW 16 | SE 6 | SW 18 | SSE 6 | SSE 11 | NNW 11 | N 6 | NNW 11 | NNW 11 | NNW 11 | ESE 8 | NNE 5 | NNW 10 | NNE 5 |
| kJ | 117 | 7 | 8 | 7 | 9 | 13 | 12 | 8 | 51 | 51 | 51 | 8 | 49 | 6 | 22 | 12 | 3 | 11 | 11 | 11 | 14 | 3 | 20 | 6 |
Wind waves Height (m) Direction Period (s) | E 4 | E 8 | E 8 | E 6 | E 8 | E 8 | E 8 | ENE 5 | E 5 | E 6 | E 6 | E 6 | E 5 | E 8 | E 8 | E 8 | ESE 5 | E 6 | E 6 | E 6 | E 8 | E 8 | E 6 | E 6 |
| kJ | 26 | 313 | 428 | 312 | 427 | 338 | 304 | 3 | 165 | 255 | 162 | 127 | 114 | 230 | 228 | 196 | 35 | 184 | 132 | 130 | 273 | 230 | 245 | 245 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 13 | 4 | 4 | 4 | 4 | 12 | 12 |
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)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Grandma's surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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