Surf Forecasts:
How big are the waves at Grandma's today (13 Aug):
- Morning surf: Morning surf (13 Aug, local time) - 3ft (0.9m), 16s period with S swell.
- Afternoon surf: Afternoon surf (13 Aug, local time) - 3.5ft (1.0m), 15s period with S swell.
- Evening surf: Evening surf (13 Aug, local time) - 3.5ft (1.0m), 15s period with S swell.
The current surf forecast for Grandma's at 7AM is: 1.0m 16s primary swell from a South direction and 0.6m 12s secondary swell from a South direction (forecast issued at 01:00am August 13). An open ocean swell of 1.1m 6s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Aug) | 3ft (0.9m) | 16s |
| Afternoon (13 Aug) | 3.5ft (1.0m) | 15s |
| Evening (13 Aug) | 3.5ft (1.0m) | 15s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 4mm), mostly falling on Fri night. Warm (max 30°C on Sat afternoon, min 25°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||||||||||
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 |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 15 | S 15 | S 14 | SSW 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 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 422 | 752 | 412 | 401 | 376 | 544 | 447 | 447 | 441 | 435 | 429 | 346 | 333 | 333 | 329 | 253 | 236 | 229 | 225 | 225 | 171 | 171 | 171 | 176 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | cross-off | off | off | off | off | off | off | cross-off | off | off | off | off | off | off | off | off | cross-off | off | off |
High Tide | 4:28AM0.43m | 4:47PM0.78m | 5:15AM0.47m | 5:22PM0.70m | 6:03AM0.51m | 5:57PM0.61m | ||||||||||||||||||
Low Tide | 9:47AM0.02m | 11:17PM0.05m | 10:36AM0.07m | 11:45PM0.05m | 11:28AM0.13m | |||||||||||||||||||
 | |  | | | | | | | | | | | |  | | |  |  | | |  | |  | |
 | — | 6:03 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:55 | — | — | — | — | — | — | — | 6:54 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — | — | — | — |
Temp °C | 25 | 25 | 26 | 29 | 29 | 28 | 26 | 25 | 25 | 25 | 26 | 29 | 29 | 28 | 26 | 26 | 26 | 26 | 27 | 29 | 30 | 29 | 27 | 26 |
Feels °C | 26 | 26 | 27 | 29 | 29 | 27 | 26 | 25 | 25 | 25 | 25 | 30 | 28 | 28 | 26 | 26 | 27 | 27 | 27 | 30 | 31 | 29 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 15 | S 15 | S 14 | SSW 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 | 422 | 752 | 412 | 401 | 376 | 544 | 447 | 447 | 441 | 435 | 429 | 346 | 333 | 333 | 329 | 253 | 236 | 229 | 225 | 225 | 171 | 171 | 171 | 176 |
Swell 2 Height (m) Direction Period (s) | S 13 | NW 12 | S 12 | S 12 | S 12 | NW 12 | NW 12 | NW 12 | ESE 7 | ESE 10 | ESE 6 | ESE 11 | N 6 | ESE 11 | ESE 11 | ESE 12 | ESE 11 | ESE 11 | ESE 11 | ESE 11 | NNE 6 | NNE 7 | NNE 7 | ESE 8 |
| kJ | 215 | 22 | 101 | 101 | 141 | 35 | 22 | 22 | 16 | 19 | 4 | 23 | 5 | 23 | 12 | 26 | 25 | 48 | 68 | 66 | 14 | 9 | 10 | 44 |
Swell 3 Height (m) Direction Period (s) | NW 12 | WNW 12 | NW 12 | NNW 12 | SW 19 | SW 19 | SW 19 | SW 18 | NW 12 | W 11 | W 11 | NNE 6 | SE 5 | W 12 | ESE 6 | SW 17 | W 11 | W 11 | NNE 6 | NNE 6 | W 11 | ESE 10 | ESE 10 | NNE 7 |
| kJ | 22 | 28 | 22 | 27 | 14 | 14 | 14 | 13 | 21 | 10 | 10 | 6 | 4 | 11 | 4 | 12 | 10 | 9 | 13 | 14 | 10 | 21 | 20 | 10 |
Wind waves Height (m) Direction Period (s) | E 6 | E 6 | E 8 | E 6 | NNW 12 | ENE 3 | E 7 | E 7 | E 6 | NNE 7 | NNE 6 | E 6 | E 11 | NNE 6 | NNE 3 | NNE 3 | NNE 4 | NNE 4 | E 11 | E 10 | ESE 10 | ESE 8 | ESE 8 | ENE 3 |
| kJ | 75 | 75 | 193 | 117 | 27 | 3 | 25 | 22 | 193 | 9 | 6 | 170 | 795 | 12 | 4 | 10 | 13 | 9 | 1498 | 1519 | 158 | 103 | 99 | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 12 | 12 | 12 | 12 | 14 | 12 | 12 | 12 | 12 | 12 | 12 | 4 | 12 | 12 | 14 | 14 | 12 | 12 | 123 | 13 | 13 | 123 | 13 | 12 |
Best forecast wave conditions in Maui | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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