- Forecast
- Maps
- Live
- Weather State
- Spot Information
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 Monday 11 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 1AM is: 0.3m 17s primary swell from a South-southwest direction (forecast issued at 07:00pm May 11). An open ocean swell of 0.4m 11s is not directed at the surf break, a second open ocean swell of 1.5m 6s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 1.5ft (0.4m) | 16s |
| Afternoon (12 May) | 1.5ft (0.4m) | 16s |
| Evening (12 May) | 1ft (0.3m) | 15s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 26°C on Tue morning, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Mon 11 | Tuesday 12 | Wednesday 13 | Thu 14 | |||||||||||||||||||||
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 17 | SSW 17 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | S 16 | SSW 16 | S 16 | S 15 | SSW 15 | SSW 14 | S 14 | S 14 | SW 15 | SSW 14 | S 13 | SSW 15 | SW 15 | S 13 | S 13 | NW 15 | NW 15 | |
101 | 101 | 58 | 54 | 86 | 84 | 84 | 129 | 82 | 42 | 38 | 42 | 41 | 66 | 65 | 34 | 37 | 31 | 21 | 33 | 30 | 30 | 116 | 109 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | cross-off | off | off | off | off | off | off | off | glassy | glassy | off | off | off | off | off | off | glassy | cross-off | |
High Tide | 00:14AM0.49m | 1:25PM0.55m | 1:00AM0.44m | 2:07PM0.64m | 1:46AM0.39m | |||||||||||||||||||
Low Tide | 6:02PM0.15m | 6:29AM-0.03m | 7:12PM0.13m | 7:01AM-0.06m | 8:16PM0.10m | 7:34AM-0.09m | ||||||||||||||||||
 |  | | | | | |  | | | |  | | | | | | | | | | | | | |
 | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:48 | — | — | — | — | — | — | — | 5:48 | — | — | — |
 | 6:53 | — | — | — | — | — | — | — | 6:54 | — | — | — | — | — | — | — | 6:54 | — | — | — | — | — | — | 6:55 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 26 | 24 | 23 | 22 | 22 | 24 | 26 | 26 | 26 | 24 | 23 | 23 | 23 | 24 | 26 | 26 | 26 | 24 | 24 | 23 | 23 | 24 | 26 | 26 |
25 | 22 | 22 | 21 | 21 | 23 | 27 | 27 | 26 | 24 | 23 | 24 | 24 | 25 | 28 | 28 | 27 | 24 | 24 | 24 | 24 | 25 | 28 | 27 | |
Swell 1 Height (m) Direction Period (s) | NNW 11 | NW 11 | N 11 | NW 11 | SSW 16 | SSW 16 | SSW 16 | S 16 | SSW 16 | N 10 | ESE 7 | ESE 7 | ESE 6 | S 14 | S 14 | NE 6 | SE 7 | SE 7 | SE 7 | N 9 | SE 5 | NW 16 | NW 15 | NW 15 |
 kJ | 68 | 30 | 58 | 29 | 86 | 84 | 84 | 129 | 82 | 52 | 19 | 18 | 16 | 66 | 65 | 8 | 13 | 13 | 11 | 13 | 7 | 68 | 116 | 109 |
Swell 2 Height (m) Direction Period (s) | SSW 17 | SSW 17 | SSW 17 | SSW 17 | N 7 | N 7 | N 7 | NNE 6 | NNW 10 | SE 7 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | SSW 14 | NNE 9 | N 9 | SW 15 | NNE 8 | S 13 | S 13 | N 8 |
| kJ | 101 | 101 | 58 | 54 | 8 | 8 | 8 | 8 | 42 | 12 | 33 | 33 | 32 | 31 | 18 | 8 | 37 | 28 | 14 | 33 | 14 | 30 | 29 | 12 |
Swell 3 Height (m) Direction Period (s) | SE 6 | NNE 6 | SE 6 | SE 6 | NW 11 | NW 11 | NW 10 | NNW 11 | SE 7 | S 16 | S 15 | SSW 15 | SSW 14 | SE 7 | SE 6 | SW 15 | NNW 9 | S 13 | SSW 15 | NNW 17 | S 13 | NNE 8 | N 8 | S 12 |
| kJ | 6 | 8 | 10 | 10 | 29 | 18 | 16 | 23 | 11 | 42 | 38 | 42 | 41 | 11 | 6 | 34 | 8 | 31 | 21 | 29 | 30 | 14 | 12 | 25 |
Wind waves Height (m) Direction Period (s) | E 5 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 7 | E 6 | E 6 | E 6 | E 6 | E 6 | NNE 6 | — | ENE 3 | ESE 6 | E 8 | E 8 | E 8 | E 8 |
| kJ | 108 | 125 | 144 | 160 | 112 | 92 | 114 | 197 | 244 | 209 | 312 | 221 | 194 | 148 | 187 | 225 | 7 | — | 2 | 22 | 223 | 268 | 240 | 240 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 12 | 12 | 12 | 12 | 12 | 12 | 4 | 4 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 |
Best forecast wave conditions in Maui | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
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.
Nearest