Surf Forecasts:
How big are the waves at Grandma's today (18 Aug):
- Morning surf: Morning surf (18 Aug, local time) - 2ft (0.6m), 13s period with S swell.
- Afternoon surf: Afternoon surf (18 Aug, local time) - 2ft (0.6m), 13s period with S swell.
- Evening surf: Evening surf (18 Aug, local time) - 1.5ft (0.4m), 18s period with SW swell.
The current surf forecast for Grandma's at 12PM is: 0.6m 13s primary swell from a South direction and 0.4m 17s secondary swell from a Southwest direction (forecast issued at 07:00am August 18). An open ocean swell of 0.8m 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 (18 Aug) | 2ft (0.6m) | 13s |
| Afternoon (18 Aug) | 2ft (0.6m) | 13s |
| Evening (18 Aug) | 1.5ft (0.4m) | 18s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 28°C on Thu afternoon, min 24°C on Tue night). Wind will be generally light. | |||||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||||||||
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 13 | S 13 | S 13 | SW 17 | S 13 | SW 18 | S 13 | S 13 | S 12 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SSW 16 | SSW 17 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 125 | 121 | 119 | 83 | 119 | 84 | 84 | 82 | 44 | 67 | 66 | 68 | 94 | 65 | 66 | 103 | 109 | 150 | 152 | 152 | 148 | 135 | 130 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | off | off | glassy | glassy | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | glassy | glassy | off | glassy |
High Tide | 8:49AM0.59m | 7:47PM0.37m | 9:55AM0.62m | 8:54PM0.32m | 10:59AM0.65m | 10:27PM0.29m | |||||||||||||||||
Low Tide | 2:48PM0.28m | 1:59AM0.08m | 4:45PM0.29m | 2:49AM0.09m | 6:46PM0.26m | ||||||||||||||||||
 |  | | | | |  | | | | | | | | | | |  | | | | | | |
 | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 25 | 27 | 27 | 27 | 25 | 24 | 24 | 24 | 25 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 25 | 27 | 28 | 27 | 26 | 26 |
Feels °C | 26 | 27 | 29 | 29 | 29 | 26 | 25 | 26 | 26 | 27 | 30 | 31 | 28 | 26 | 27 | 28 | 28 | 28 | 30 | 32 | 31 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | SSW 16 | SSW 17 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 16 |
| kJ | 125 | 121 | 119 | 83 | 119 | 84 | 84 | 82 | 44 | 44 | 44 | 44 | 45 | 45 | 45 | 103 | 109 | 150 | 152 | 152 | 148 | 135 | 130 |
Swell 2 Height (m) Direction Period (s) | ESE 5 | SW 16 | SW 17 | SW 17 | NNE 5 | SW 18 | SW 18 | SSW 18 | W 12 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | S 12 | S 12 | S 12 | S 11 | S 11 | S 11 | S 11 | S 11 |
| kJ | 2 | 42 | 73 | 77 | 5 | 80 | 49 | 31 | 11 | 67 | 66 | 68 | 94 | 65 | 66 | 45 | 44 | 41 | 21 | 20 | 21 | 21 | 21 |
Swell 3 Height (m) Direction Period (s) | SSW 16 | NNE 5 | ESE 5 | SE 4 | SW 18 | N 4 | W 13 | W 12 | SSW 15 | W 12 | W 12 | W 12 | W 12 | SW 19 | N 6 | N 6 | N 6 | N 6 | S 12 | S 16 | S 15 | S 15 | S 15 |
| kJ | 26 | 3 | 2 | 1 | 79 | 3 | 13 | 11 | 22 | 11 | 11 | 11 | 11 | 58 | 3 | 3 | 3 | 3 | 11 | 20 | 18 | 17 | 38 |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | E 5 | NNE 5 | E 9 | E 5 | N 4 | N 5 | E 8 | E 8 | E 8 | N 6 | N 6 | N 6 | E 8 | E 8 | — | — | N 6 | NNW 3 | NNW 3 | N 3 | N 3 |
| kJ | 144 | 113 | 29 | 4 | 122 | 70 | 1 | 2 | 138 | 135 | 132 | 3 | 7 | 7 | 125 | 122 | — | — | 7 | 3 | 3 | 4 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 4 | 12 | 4 | 4 | 4 | 4 | 12 | 12 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
Best forecast wave conditions in Maui | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
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