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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 Tuesday 12 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 slightly warmer than usual)How big are the waves at Grandma's today?
The current surf forecast for Grandma's at 3AM is: 0.3m 15s primary swell from a South-southwest direction (forecast issued at 07:00pm May 12). An open ocean swell of 0.4m 10s is not directed at the surf break, a second open ocean swell of 0.4m 7s is not directed at the surf break, a second open ocean swell of 1.7m 6s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 May) | 1.5ft (0.4m) | 14s |
| Afternoon (13 May) | 1.5ft (0.4m) | 7s |
| Evening (13 May) | 1ft (0.3m) | 13s |
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 Thu afternoon. Warm (max 26°C on Wed morning, min 23°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Tue 12 | Wednesday 13 | Thursday 14 | Fri 15 | |||||||||||||||||||||
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 16 | S 16 | S 15 | SSW 15 | SSW 14 | S 14 | S 14 | SE 6 | SSW 14 | S 13 | SW 15 | SW 15 | S 13 | S 13 | NW 15 | NW 15 | NW 15 | NNW 14 | NW 14 | NW 14 | SW 16 | SSW 16 | NW 13 | NW 13 | |
82 | 42 | 39 | 42 | 41 | 66 | 65 | 10 | 37 | 35 | 33 | 33 | 30 | 29 | 116 | 109 | 107 | 0 | 158 | 149 | 67 | 102 | 100 | 99 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | cross-off | cross-off | off | off | off | off | cross-off | off | glassy | cross-off | cross-off | glassy | cross-off | glassy | glassy | glassy | on | cross-on | |
High Tide | 1:00AM0.44m | 2:07PM0.64m | 1:46AM0.39m | 2:49PM0.73m | 2:32AM0.34m | |||||||||||||||||||
Low Tide | 7:12PM0.13m | 7:01AM-0.06m | 8:16PM0.10m | 7:34AM-0.09m | 9:16PM0.07m | 8:10AM-0.10m | ||||||||||||||||||
 |  | |  | |  | | | | | | | | | | |  | | | | | | |  | |
 | — | — | — | — | 5:48 | — | — | — | — | — | — | — | 5:48 | — | — | — | — | — | — | — | 5:48 | — | — | — |
 | 6:54 | — | — | — | — | — | — | — | 6:54 | — | — | — | — | — | — | — | 6:55 | — | — | — | — | — | — | 6:55 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | |
Temp °C | 26 | 24 | 24 | 23 | 23 | 24 | 26 | 26 | 26 | 24 | 23 | 23 | 23 | 24 | 26 | 26 | 25 | 25 | 25 | 24 | 24 | 25 | 26 | 26 |
26 | 23 | 24 | 23 | 24 | 25 | 27 | 26 | 25 | 24 | 23 | 24 | 24 | 25 | 28 | 28 | 27 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | |
Swell 1 Height (m) Direction Period (s) | SSW 16 | N 10 | N 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | SE 6 | SE 7 | SE 7 | N 9 | N 8 | N 8 | NNE 8 | NW 15 | NW 15 | NW 15 | NNW 14 | NW 14 | NW 14 | NNW 13 | NNW 13 | NW 13 | NW 13 |
 kJ | 82 | 52 | 51 | 33 | 32 | 31 | 31 | 10 | 19 | 13 | 14 | 12 | 12 | 22 | 116 | 109 | 107 | 140 | 158 | 149 | 120 | 116 | 83 | 79 |
Swell 2 Height (m) Direction Period (s) | NNW 10 | ESE 7 | SE 7 | SE 7 | ESE 7 | S 14 | S 14 | NNE 6 | SSW 14 | S 13 | SW 15 | SW 15 | S 13 | NW 16 | NNE 8 | NNE 8 | SE 6 | SE 6 | SE 6 | SE 6 | SW 16 | SSW 16 | SSW 16 | SSW 16 |
| kJ | 42 | 18 | 13 | 12 | 18 | 66 | 65 | 7 | 37 | 31 | 33 | 33 | 30 | 68 | 22 | 22 | 9 | 9 | 9 | 9 | 67 | 102 | 100 | 99 |
Swell 3 Height (m) Direction Period (s) | SE 7 | S 16 | S 15 | SSW 15 | SSW 14 | SE 7 | SE 7 | NNW 9 | NNW 9 | SSW 13 | S 13 | NNW 17 | SE 8 | S 13 | S 12 | S 12 | NNE 8 | N 8 | N 8 | S 12 | S 12 | ESE 6 | ESE 6 | SE 6 |
| kJ | 12 | 42 | 39 | 42 | 41 | 11 | 12 | 8 | 8 | 35 | 14 | 29 | 14 | 29 | 27 | 25 | 22 | 12 | 12 | 25 | 25 | 3 | 3 | 8 |
Wind waves Height (m) Direction Period (s) | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 7 | E 7 | ESE 7 | ESE 7 | E 8 | E 8 | E 8 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 |
| kJ | 235 | 235 | 173 | 228 | 269 | 200 | 178 | 156 | 236 | 236 | 19 | 18 | 193 | 255 | 290 | 214 | 229 | 104 | 96 | 80 | 62 | 72 | 60 | 67 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 134 | 12 | 12 | 12 | 12 | 12 | 12 | 14 | 4 | 4 | 4 | 4 | 4 | 4 | 14 | 14 |
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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