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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 1 am Friday 15 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 10AM is: 0.4m 16s primary swell from a South-southwest direction (forecast issued at 01:00am May 15). An open ocean swell of 0.6m 13s is not directed at the surf break, a second open ocean swell of 1.6m 6s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 May) | 1.5ft (0.4m) | 16s |
| Afternoon (15 May) | 1.5ft (0.4m) | 16s |
| Evening (15 May) | 1.5ft (0.4m) | 16s |
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 Fri afternoon. Warm (max 27°C on Sun afternoon, min 24°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||||||
Friday 15 | Saturday 16 | Sunday 17 | ||||||||||||||||||||||
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 | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
NW 14 | SW 16 | SSW 16 | NW 13 | NW 13 | SSW 16 | SSW 16 | SW 16 | SW 16 | SW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | |
149 | 67 | 102 | 99 | 99 | 99 | 99 | 66 | 40 | 49 | 121 | 54 | 54 | 53 | 54 | 57 | 57 | 89 | 138 | 133 | 131 | 146 | 146 | 188 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | cross-off | glassy | cross-on | glassy | glassy | cross-off | glassy | glassy | glassy | glassy | glassy | glassy | glassy | glassy | cross-off | glassy | glassy | glassy | glassy | off | off | cross-off | off | |
High Tide | 2:32AM0.34m | 3:32PM0.79m | 3:19AM0.29m | 4:17PM0.83m | 4:09AM0.25m | 5:04PM0.84m | ||||||||||||||||||
Low Tide | 8:10AM-0.10m | 10:14PM0.05m | 8:49AM-0.11m | 11:12PM0.04m | 9:30AM-0.10m | |||||||||||||||||||
 | |  |  |  | |  |  | | | | | | | | | | | | | | | | | |
 | — | 5:48 | — | — | — | — | — | — | — | 5:48 | — | — | — | — | — | — | — | 5:48 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:55 | — | — | — | — | — | — | — | 6:55 | — | — | — | — | — | — | — | 6:57 | — | — |
— | — | — | — | 1 | 2 | 1 | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 24 | 24 | 24 | 26 | 26 | 26 | 25 | 24 | 24 | 24 | 25 | 26 | 26 | 26 | 26 | 25 | 24 | 24 | 24 | 26 | 27 | 26 | 25 | 24 |
27 | 26 | 27 | 28 | 29 | 29 | 27 | 27 | 27 | 27 | 28 | 29 | 29 | 29 | 30 | 28 | 28 | 28 | 27 | 29 | 30 | 28 | 27 | 27 | |
Swell 1 Height (m) Direction Period (s) | NW 14 | NNW 13 | NNW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | NW 12 | SW 14 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SSW 17 | SW 14 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 |
 kJ | 149 | 120 | 116 | 83 | 79 | 73 | 71 | 36 | 35 | 49 | 121 | 54 | 54 | 53 | 53 | 53 | 57 | 72 | 138 | 133 | 131 | 146 | 146 | 188 |
Swell 2 Height (m) Direction Period (s) | SE 6 | SW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SW 16 | S 11 | NW 11 | NW 11 | NW 11 | NNW 11 | SSW 16 | SSW 17 | SSW 17 | SW 13 | SSW 16 | SW 15 | SW 14 | SW 14 | SSE 11 | SSE 10 | SW 21 |
| kJ | 9 | 67 | 102 | 99 | 99 | 99 | 99 | 66 | 21 | 33 | 31 | 31 | 40 | 52 | 54 | 57 | 42 | 89 | 54 | 54 | 54 | 37 | 37 | 117 |
Swell 3 Height (m) Direction Period (s) | SW 17 | SE 6 | SE 6 | SE 6 | SE 6 | SE 8 | S 11 | SSE 11 | SW 16 | S 11 | SE 6 | S 12 | SSW 16 | NW 11 | NW 11 | SSE 12 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | S 5 | SW 21 | SW 21 | S 6 |
| kJ | 43 | 6 | 6 | 9 | 11 | 17 | 21 | 23 | 40 | 21 | 6 | 24 | 53 | 19 | 19 | 26 | 9 | 8 | 12 | 6 | 5 | 117 | 117 | 7 |
Wind waves Height (m) Direction Period (s) | E 6 | E 6 | E 6 | E 6 | E 6 | N 7 | E 8 | E 8 | E 5 | E 6 | E 6 | E 8 | — | E 8 | E 8 | — | — | — | E 8 | E 8 | NNE 6 | E 8 | E 8 | E 5 |
| kJ | 170 | 148 | 148 | 181 | 128 | 4 | 217 | 260 | 54 | 129 | 119 | 224 | — | 223 | 252 | — | — | — | 156 | 224 | 4 | 199 | 199 | 37 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 12 | 12 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 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)
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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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