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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 pm Saturday 23 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
25.5° 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 9PM is: 0.5m 15s primary swell from a South direction (forecast issued at 01:00pm May 23). An open ocean swell of 0.4m 5s is not directed at the surf break, a second open ocean swell of 0.4m 9s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 May) | 1.5ft (0.5m) | 16s |
| Afternoon (23 May) | 2ft (0.6m) | 15s |
| Evening (23 May) | 1.5ft (0.5m) | 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 Sat afternoon, min 22°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||||
Sat 23 | Sunday 24 | Monday 25 | Tue 26 | |||||||||||||||||||||
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 | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
S 16 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | |
129 | 165 | 159 | 157 | 109 | 153 | 144 | 94 | 93 | 93 | 94 | 93 | 96 | 97 | 63 | 97 | 91 | 87 | 85 | 84 | 84 | 84 | 53 | 83 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | off | off | |
High Tide | 10:59AM0.35m | 10:25PM0.55m | 11:57AM0.44m | 11:17PM0.48m | 12:46PM0.52m | 00:06AM0.42m | ||||||||||||||||||
Low Tide | 3:36PM0.18m | 5:14AM-0.00m | 5:07PM0.20m | 5:45AM-0.02m | 6:32PM0.20m | 6:16AM-0.03m | ||||||||||||||||||
 |  | |  |  | | | | | | | | | | | | |  | | | | | | | |
 | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — | — | 5:45 | — |
 | — | — | 6:59 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | 7:00 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 25 | 26 | 25 | 23 | 23 | 22 | 22 | 23 | 25 | 26 | 26 | 24 | 23 | 22 | 22 | 24 | 25 | 25 | 25 | 23 | 23 | 23 | 23 | 24 |
21 | 24 | 22 | 21 | 22 | 21 | 22 | 21 | 24 | 25 | 24 | 23 | 23 | 22 | 21 | 23 | 24 | 25 | 24 | 22 | 23 | 23 | 23 | 23 | |
Swell 1 Height (m) Direction Period (s) | S 16 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 |
 kJ | 129 | 165 | 159 | 157 | 109 | 153 | 144 | 94 | 93 | 93 | 94 | 93 | 96 | 97 | 63 | 97 | 91 | 87 | 85 | 84 | 84 | 84 | 53 | 83 |
Swell 2 Height (m) Direction Period (s) | NNE 8 | SE 6 | NNE 9 | SE 5 | NNE 9 | NNE 8 | NNE 8 | NNE 8 | NNE 9 | NNE 9 | NNE 9 | NNE 9 | ESE 6 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NNE 8 |
| kJ | 23 | 10 | 25 | 7 | 26 | 20 | 21 | 23 | 25 | 26 | 26 | 26 | 15 | 22 | 22 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 18 | 11 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | NNW 16 | SE 6 | NW 15 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | NNE 8 | SE 6 | NW 11 | NW 11 | NW 11 | NW 11 | SE 6 | SE 6 | SE 6 | SE 5 | SE 5 | SE 6 |
| kJ | 33 | 25 | 8 | 56 | 54 | 51 | 46 | 44 | 42 | 39 | 37 | 37 | 24 | 9 | 20 | 19 | 19 | 19 | 5 | 6 | 9 | 7 | 4 | 5 |
Wind waves Height (m) Direction Period (s) | NE 2 | NNE 7 | E 6 | NNE 9 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | SE 6 | E 6 | E 6 | E 6 | E 5 | E 5 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 |
| kJ | 1 | 21 | 211 | 32 | 125 | 181 | 104 | 85 | 85 | 89 | 89 | 8 | 169 | 125 | 89 | 54 | 54 | 119 | 166 | 116 | 149 | 105 | 72 | 104 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 123 | 12 | 14 | 12 | 12 | 12 | 4 | 12 | 13 | 4 | 12 | 12 | 4 | 4 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 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)
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