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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 22 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
25.6° 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 9AM is: 0.5m 14s primary swell from a South direction (forecast issued at 01:00am May 22). An open ocean swell of 0.3m 7s is not directed at the surf break, a second open ocean swell of 0.2m 2s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 1.5ft (0.5m) | 14s |
| Afternoon (22 May) | 1.5ft (0.4m) | 14s |
| Evening (22 May) | 1.5ft (0.4m) | 18s |
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 Fri morning, min 22°C on Fri night). Winds decreasing (fresh winds from the NE on Sat morning, light winds from the NNE by Sun morning). | ||||||||||||||||||||||||
Friday 22 | Saturday 23 | Sunday 24 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
S 15 | S 15 | S 15 | SSW 14 | SSW 14 | SSW 18 | SSW 18 | SSW 16 | S 16 | S 16 | S 16 | 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 | |
110 | 110 | 109 | 69 | 65 | 103 | 102 | 91 | 134 | 132 | 132 | 129 | 165 | 159 | 110 | 109 | 153 | 144 | 94 | 93 | 93 | 94 | 95 | 97 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | |
High Tide | 9:51AM0.28m | 9:31PM0.62m | 10:59AM0.35m | 10:25PM0.55m | 11:57AM0.44m | |||||||||||||||||||
Low Tide | 3:55AM0.02m | 2:11PM0.13m | 4:37AM0.01m | 3:36PM0.18m | 5:14AM-0.00m | 5:07PM0.20m | ||||||||||||||||||
 | |  | | | | | |  | | | |  | | | | | | | | | | | | |
 | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 7:00 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 22 | 22 | 24 | 26 | 26 | 25 | 23 | 23 | 22 | 23 | 24 | 25 | 26 | 25 | 23 | 23 | 22 | 22 | 24 | 26 | 26 | 26 | 24 | 23 |
21 | 20 | 22 | 23 | 23 | 21 | 20 | 21 | 21 | 21 | 21 | 21 | 23 | 23 | 21 | 21 | 21 | 20 | 23 | 26 | 25 | 25 | 22 | 22 | |
Swell 1 Height (m) Direction Period (s) | S 15 | S 15 | S 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | S 16 | S 16 | S 16 | 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 |
 kJ | 110 | 110 | 109 | 69 | 65 | 62 | 60 | 91 | 134 | 132 | 132 | 129 | 165 | 159 | 110 | 109 | 153 | 144 | 94 | 93 | 93 | 94 | 95 | 97 |
Swell 2 Height (m) Direction Period (s) | NNE 6 | NNE 7 | N 7 | NNE 7 | SSW 18 | SSW 18 | SSW 18 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | SSW 13 | SE 6 | NNE 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 9 | NNE 9 | NNE 9 |
| kJ | 14 | 18 | 8 | 15 | 61 | 103 | 102 | 18 | 21 | 21 | 19 | 33 | 5 | 18 | 20 | 20 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 25 |
Swell 3 Height (m) Direction Period (s) | SE 6 | SE 6 | SE 6 | S 18 | SE 6 | SE 6 | N 7 | SSW 13 | SE 6 | SSW 13 | SSW 13 | SE 6 | NNE 9 | SE 6 | SE 6 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | SE 6 |
| kJ | 9 | 5 | 5 | 56 | 5 | 9 | 8 | 60 | 10 | 34 | 34 | 5 | 8 | 5 | 8 | 54 | 51 | 46 | 44 | 42 | 39 | 37 | 37 | 9 |
Wind waves Height (m) Direction Period (s) | E 7 | ENE 2 | ENE 2 | E 6 | NNE 6 | NNE 6 | NE 3 | E 6 | E 6 | E 6 | NE 3 | NE 8 | NNE 7 | ENE 2 | ENE 2 | ENE 2 | ENE 3 | ENE 2 | ENE 2 | E 6 | E 6 | E 6 | E 6 | — |
| kJ | 352 | 1 | 1 | 123 | 11 | 15 | 2 | 19 | 211 | 170 | 2 | 28 | 20 | 1 | 1 | 1 | 1 | 1 | 1 | 100 | 160 | 193 | 160 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 12 | 12 | 12 | 12 | 12 | 345 | 12 | 12 | 12 | 12 | 13 | 123 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 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
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