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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 Saturday 30 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 (30 May):
- Morning surf: Morning surf (30 May, local time) - 2.5ft (0.8m), 17s period with SSW swell.
- Afternoon surf: Afternoon surf (30 May, local time) - 2.5ft (0.8m), 16s period with SSW swell.
- Evening surf: Evening surf (30 May, local time) - 2.5ft (0.8m), 16s period with SSW swell.
The current surf forecast for Grandma's at 9AM is: 0.8m 17s primary swell from a South-southwest direction and 0.4m 12s secondary swell from a South direction (forecast issued at 01:00am May 30). An open ocean swell of 0.7m 4s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 May) | 2.5ft (0.8m) | 17s |
| Afternoon (30 May) | 2.5ft (0.8m) | 16s |
| Evening (30 May) | 2.5ft (0.8m) | 16s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Mon afternoon. Warm (max 26°C on Sun afternoon, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 30 | Sunday 31 | Monday 1 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
SSW 18 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 18 | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 17 | |
418 | 408 | 394 | 367 | 359 | 350 | 341 | 337 | 329 | 320 | 304 | 292 | 225 | 218 | 215 | 215 | 215 | 213 | 260 | 329 | 418 | 413 | 315 | 372 | |
Wind (km/h) | ||||||||||||||||||||||||
off | cross-off | cross-off | glassy | glassy | glassy | off | glassy | cross-off | off | off | glassy | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | off | off | |
High Tide | 3:05AM0.26m | 4:01PM0.75m | 3:47AM0.24m | 4:38PM0.75m | 4:31AM0.23m | 5:16PM0.75m | ||||||||||||||||||
Low Tide | 8:23AM-0.05m | 11:02PM0.10m | 8:59AM-0.04m | 11:43PM0.09m | 9:36AM-0.02m | |||||||||||||||||||
 | |  |  | | |  | | | | | | | | | | | | | | |  | | | |
 | — | 5:45 | — | — | — | — | — | — | — | 5:43 | — | — | — | — | — | — | — | 5:43 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | |
Temp °C | 23 | 23 | 24 | 25 | 25 | 25 | 24 | 24 | 23 | 23 | 24 | 25 | 25 | 26 | 24 | 24 | 23 | 23 | 24 | 26 | 26 | 25 | 24 | 24 |
24 | 25 | 26 | 27 | 28 | 27 | 26 | 26 | 25 | 24 | 26 | 28 | 27 | 28 | 25 | 25 | 24 | 24 | 24 | 28 | 27 | 25 | 25 | 26 | |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 17 |
 kJ | 418 | 408 | 394 | 367 | 359 | 350 | 341 | 337 | 329 | 320 | 304 | 292 | 225 | 218 | 215 | 215 | 215 | 213 | 158 | 329 | 418 | 413 | 315 | 372 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | SSE 12 | SSE 12 | SSE 12 | S 12 | SSE 11 | SSE 11 | SSE 11 | N 9 | S 11 | S 11 | N 9 | N 9 | S 19 | SSW 19 | SSW 19 | SSW 18 | SSW 14 | S 13 | S 13 | S 13 | S 13 |
| kJ | 77 | 71 | 44 | 46 | 46 | 46 | 42 | 43 | 41 | 23 | 15 | 20 | 20 | 14 | 25 | 192 | 212 | 207 | 260 | 152 | 130 | 87 | 126 | 126 |
Swell 3 Height (m) Direction Period (s) | NNE 10 | NNE 10 | NNE 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | N 8 | SSE 11 | N 8 | SSW 21 | S 11 | SSW 20 | S 10 | SE 8 | SE 8 | S 10 | SSE 10 | SSE 10 | N 10 | S 21 | S 21 |
| kJ | 19 | 19 | 19 | 21 | 20 | 19 | 19 | 19 | 19 | 5 | 23 | 12 | 44 | 20 | 128 | 9 | 3 | 3 | 8 | 9 | 9 | 46 | 233 | 233 |
Wind waves Height (m) Direction Period (s) | E 7 | E 8 | E 4 | E 7 | E 8 | — | E 8 | E 8 | E 8 | — | — | — | N 9 | NNE 3 | E 8 | N 9 | N 11 | N 10 | NNE 10 | N 10 | N 10 | E 8 | N 9 | N 9 |
| kJ | 68 | 74 | 18 | 130 | 110 | — | 114 | 74 | 76 | — | — | — | 25 | 3 | 82 | 25 | 37 | 32 | 33 | 31 | 49 | 117 | 28 | 42 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 12 | 12 | 12 | 4 |
Best forecast wave conditions in Maui | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
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Ocean Swells (m)- Wind Speed (km/h)
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