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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 am Wednesday 27 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 normal for this time of year)How big are the waves at Grandma's today (27 May):
- Morning surf: Morning surf (27 May, local time) - 1.5ft (0.5m), 14s period with S swell.
- Afternoon surf: Afternoon surf (27 May, local time) - 1.5ft (0.5m), 14s period with S swell.
- Evening surf: Evening surf (27 May, local time) - 1.5ft (0.5m), 13s period with S swell.
The current surf forecast for Grandma's at 10AM is: 0.5m 14s primary swell from a South direction and 0.4m 15s secondary swell from a Northwest direction (forecast issued at 07:00am May 27). An open ocean swell of 1.1m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 May) | 1.5ft (0.5m) | 14s |
| Afternoon (27 May) | 1.5ft (0.5m) | 14s |
| Evening (27 May) | 1.5ft (0.5m) | 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 2mm), mostly falling on Thu afternoon. Warm (max 26°C on Wed afternoon, min 22°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 27 | Thursday 28 | Friday 29 | Sat 30 | |||||||||||||||||||||
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 | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | SSW 22 | SSW 21 | SSW 21 | SSW 21 | SSW 20 | SSW 20 | SSW 19 | SSW 19 | SSW 18 | SSW 18 | SSW 18 | |
102 | 100 | 97 | 92 | 88 | 125 | 85 | 83 | 80 | 74 | 73 | 72 | 72 | 156 | 153 | 256 | 343 | 311 | 395 | 497 | 476 | 447 | 427 | 418 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | glassy | cross-off | off | off | off | off | off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | |
High Tide | 2:10PM0.66m | 1:38AM0.32m | 2:48PM0.70m | 2:22AM0.29m | 3:25PM0.73m | |||||||||||||||||||
Low Tide | 6:45AM-0.04m | 8:45PM0.16m | 7:16AM-0.05m | 9:36PM0.13m | 7:49AM-0.05m | 10:21PM0.11m | ||||||||||||||||||
 |  | |  | |  | | | | | |  |  | | | | | | | | | | | | |
 | 5:45 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — | 5:45 |
 | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:01 | — | — | 7:01 |
— | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 22 | 23 | 25 | 26 | 24 | 23 | 23 | 22 | 22 | 24 | 25 | 24 | 25 | 23 | 23 | 22 | 22 | 24 | 25 | 26 | 26 | 24 | 23 | 22 |
22 | 22 | 25 | 26 | 23 | 22 | 23 | 22 | 23 | 25 | 26 | 24 | 24 | 23 | 24 | 23 | 23 | 24 | 26 | 26 | 25 | 24 | 23 | 23 | |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | SSW 21 | SSW 21 | SSW 20 | SSW 20 | SSW 19 | SSW 19 | SSW 18 | SSW 18 | SSW 18 |
 kJ | 102 | 100 | 97 | 92 | 88 | 125 | 85 | 83 | 80 | 74 | 73 | 72 | 72 | 71 | 68 | 256 | 343 | 311 | 395 | 497 | 476 | 447 | 427 | 418 |
Swell 2 Height (m) Direction Period (s) | NW 16 | NW 15 | NW 15 | NW 14 | NW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | SSW 21 | S 12 | S 11 | S 11 | S 11 | S 11 | S 11 | S 11 | SSE 11 | S 13 |
| kJ | 91 | 79 | 77 | 74 | 67 | 68 | 65 | 61 | 61 | 61 | 59 | 53 | 52 | 37 | 153 | 70 | 41 | 64 | 61 | 39 | 39 | 39 | 42 | 82 |
Swell 3 Height (m) Direction Period (s) | NNE 7 | NNE 7 | NNE 7 | SE 5 | NNE 5 | NNE 6 | SE 6 | SE 6 | NNE 6 | NNE 6 | NE 6 | NNE 6 | NNE 5 | SSW 22 | NW 12 | NNE 10 | NW 12 | NNE 11 | NNE 11 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NE 10 |
| kJ | 9 | 9 | 9 | 4 | 6 | 6 | 5 | 8 | 4 | 4 | 6 | 7 | 6 | 156 | 37 | 35 | 34 | 37 | 37 | 34 | 33 | 32 | 32 | 24 |
Wind waves Height (m) Direction Period (s) | E 6 | E 6 | E 5 | E 5 | E 5 | E 5 | E 6 | E 6 | E 5 | E 7 | E 7 | E 5 | E 5 | E 5 | E 5 | E 5 | E 5 | E 5 | E 5 | E 7 | E 7 | E 5 | E 5 | E 5 |
| kJ | 98 | 85 | 58 | 94 | 43 | 52 | 125 | 105 | 54 | 124 | 102 | 21 | 71 | 90 | 67 | 60 | 62 | 62 | 52 | 126 | 130 | 48 | 74 | 65 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 12 | 12 | 4 | 4 | 4 | 12 | 12 | 12 | 12 | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 12 | 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)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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