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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 Thursday 28 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 (28 May):
- Morning surf: Morning surf (28 May, local time) - 1.5ft (0.5m), 12s period with S swell.
- Afternoon surf: Afternoon surf (28 May, local time) - 1.5ft (0.5m), 12s period with S swell.
- Evening surf: Evening surf (28 May, local time) - 1.5ft (0.4m), 22s period with SSW swell.
The current surf forecast for Grandma's at 12PM is: 0.5m 12s primary swell from a South direction and 0.4m 13s secondary swell from a Northwest direction (forecast issued at 07:00am May 28). An open ocean swell of 1.1m 7s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 May) | 1.5ft (0.5m) | 12s |
| Afternoon (28 May) | 1.5ft (0.5m) | 12s |
| Evening (28 May) | 1.5ft (0.4m) | 22s |
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 Thu morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 28 | Friday 29 | Saturday 30 | Sun 31 | |||||||||||||||||||||
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 13 | S 12 | S 12 | S 12 | SSW 23 | SSW 22 | SSW 21 | SSW 21 | SSW 21 | SSW 20 | SSW 20 | SSW 19 | SSW 19 | SSW 18 | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | |
80 | 74 | 73 | 72 | 104 | 156 | 153 | 256 | 343 | 311 | 395 | 497 | 476 | 447 | 427 | 418 | 408 | 394 | 372 | 359 | 350 | 341 | 337 | 329 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | glassy | off | off | off | off | off | off | off | glassy | cross-off | off | off | cross-off | cross-off | off | off | glassy | glassy | off | cross-off | cross-off | glassy | |
High Tide | 2:48PM0.70m | 2:22AM0.29m | 3:25PM0.73m | 3:05AM0.26m | 4:01PM0.75m | |||||||||||||||||||
Low Tide | 7:16AM-0.05m | 9:36PM0.13m | 7:49AM-0.05m | 10:21PM0.11m | 8:23AM-0.05m | 11:02PM0.10m | ||||||||||||||||||
 |  |  | | | | | | | | | |  | |  | | | | | | | | | | |
 | 5:45 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — | 5:43 |
 | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:01 | — | — | 7:02 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 22 | 24 | 26 | 25 | 26 | 24 | 23 | 23 | 22 | 24 | 26 | 25 | 25 | 23 | 23 | 23 | 22 | 24 | 25 | 26 | 25 | 24 | 23 | 23 |
23 | 24 | 28 | 25 | 26 | 24 | 23 | 24 | 22 | 24 | 28 | 26 | 25 | 23 | 24 | 25 | 23 | 26 | 27 | 28 | 26 | 24 | 24 | 25 | |
Swell 1 Height (m) Direction Period (s) | 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 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 |
 kJ | 80 | 74 | 73 | 72 | 72 | 71 | 68 | 256 | 343 | 311 | 395 | 497 | 476 | 447 | 427 | 418 | 408 | 394 | 372 | 359 | 350 | 341 | 337 | 329 |
Swell 2 Height (m) Direction Period (s) | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | SSW 21 | S 12 | S 11 | S 11 | S 11 | S 11 | SSE 11 | SSE 11 | SSE 11 | S 13 | S 12 | SSE 12 | SSE 12 | S 12 | S 12 | SSE 12 | SSE 11 | SSE 11 |
| kJ | 61 | 61 | 59 | 53 | 52 | 37 | 153 | 42 | 64 | 61 | 61 | 39 | 41 | 41 | 42 | 81 | 71 | 46 | 46 | 44 | 43 | 45 | 43 | 42 |
Swell 3 Height (m) Direction Period (s) | NNE 6 | NE 6 | NNE 6 | NNE 5 | SSW 23 | SSW 22 | NW 12 | NW 12 | NNE 10 | NNE 11 | NNE 11 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNE 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 |
| kJ | 4 | 6 | 4 | 5 | 104 | 156 | 37 | 36 | 37 | 37 | 37 | 34 | 33 | 19 | 19 | 19 | 19 | 19 | 11 | 20 | 19 | 19 | 32 | 19 |
Wind waves Height (m) Direction Period (s) | E 6 | E 7 | E 7 | E 5 | E 5 | E 6 | E 6 | E 5 | E 5 | E 5 | E 5 | E 5 | E 5 | E 5 | E 5 | E 7 | E 5 | E 7 | E 8 | — | E 8 | E 8 | E 5 | E 5 |
| kJ | 49 | 83 | 121 | 40 | 90 | 89 | 105 | 67 | 52 | 50 | 79 | 90 | 71 | 119 | 70 | 108 | 50 | 124 | 110 | — | 95 | 169 | 62 | 34 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 12 | 12 | 12 | 4 | 12 | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 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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