Surf Forecasts:
How big are the waves at Grandma's today (12 Sep):
- Morning surf: Morning surf (12 Sep, local time) - 2ft (0.6m), 15s period with SSW swell.
- Afternoon surf: Afternoon surf (12 Sep, local time) - 1.5ft (0.4m), 16s period with SW swell.
- Evening surf: Evening surf (12 Sep, local time) - 1.5ft (0.4m), 16s period with SW swell.
The current surf forecast for Grandma's at 10AM is: 0.6m 15s primary swell from a South-southwest direction and 0.3m 11s secondary swell from a South-southwest direction (forecast issued at 01:00am September 12). An open ocean swell of 0.4m 4s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Sep) | 2ft (0.6m) | 15s |
| Afternoon (12 Sep) | 1.5ft (0.4m) | 16s |
| Evening (12 Sep) | 1.5ft (0.4m) | 16s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 27°C on Sat morning, min 24°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||||||||||
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) | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SSW 14 | SSW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 14 | SW 14 | SW 14 | SW 22 | SW 22 | SW 22 | SW 21 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 148 | 148 | 148 | 158 | 66 | 73 | 64 | 64 | 64 | 75 | 148 | 60 | 55 | 54 | 54 | 33 | 54 | 78 | 50 | 50 | 124 | 118 | 118 | 117 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | glassy | glassy | off | off | off | off | cross-off | cross-off | glassy | glassy | off | cross-off | off | off | off | off | glassy | glassy | off | cross-off | cross-off |
High Tide | 4:49AM0.61m | 4:47PM0.58m | 5:30AM0.64m | 5:19PM0.50m | 6:15AM0.66m | 5:52PM0.44m | ||||||||||||||||||
Low Tide | 10:34AM0.12m | 10:45PM0.05m | 11:25AM0.16m | 11:13PM0.06m | 12:19PM0.20m | |||||||||||||||||||
 | |  | | | | |  | | | | |  | | | | | | | | | | | | |
 | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:31 | — | — | — | — | — | — | — | 6:30 | — | — | — | — | — | — | — | 6:30 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 27 | 27 | 27 | 25 | 25 | 25 | 25 | 25 | 27 | 27 | 27 | 25 | 25 | 24 | 24 | 25 | 27 | 27 | 27 | 26 | 25 |
Feels °C | 27 | 27 | 27 | 29 | 29 | 29 | 26 | 26 | 27 | 28 | 27 | 30 | 30 | 29 | 25 | 26 | 25 | 25 | 26 | 30 | 29 | 28 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SW 14 | SSW 14 | SW 13 | SW 13 | SW 13 | SSW 14 | SSW 15 | SSW 12 | SW 15 | SW 15 | NNE 8 | SW 14 | SW 14 | SSW 14 | SW 14 | SW 14 | SW 14 | SW 22 | SSW 14 | SW 13 |
| kJ | 148 | 148 | 148 | 158 | 49 | 73 | 45 | 45 | 44 | 75 | 148 | 60 | 55 | 54 | 14 | 33 | 52 | 78 | 50 | 50 | 50 | 118 | 71 | 45 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | SW 9 | SSW 11 | SW 16 | NNE 9 | SW 16 | SW 16 | SW 16 | NNE 9 | NNE 9 | SW 15 | SW 12 | NNE 8 | SW 14 | SSW 12 | NNE 8 | NNE 8 | SSW 11 | SW 9 | SW 22 | SW 14 | NNE 8 | SW 21 |
| kJ | 23 | 21 | 12 | 23 | 66 | 25 | 64 | 64 | 64 | 15 | 15 | 57 | 23 | 14 | 54 | 14 | 7 | 7 | 12 | 3 | 124 | 49 | 12 | 117 |
Swell 3 Height (m) Direction Period (s) | SW 9 | SW 8 | S 11 | WSW 8 | NNE 8 | SW 16 | NNE 9 | NNE 9 | NNE 9 | SSW 16 | SE 4 | NNE 9 | NNE 8 | SW 12 | SW 12 | NNE 8 | SSW 24 | SSW 24 | NNE 8 | NNE 8 | SSW 11 | SSW 11 | SW 22 | N 5 |
| kJ | 12 | 11 | 20 | 7 | 7 | 66 | 15 | 15 | 15 | 25 | 3 | 15 | 14 | 23 | 23 | 7 | 54 | 54 | 7 | 7 | 12 | 12 | 118 | 2 |
Wind waves Height (m) Direction Period (s) | E 4 | E 4 | E 4 | — | — | ESE 4 | ESE 4 | ESE 5 | ESE 5 | SE 5 | ESE 4 | — | NNE 2 | N 3 | E 4 | NE 3 | NNE 3 | E 4 | E 4 | E 4 | NNE 8 | NNE 3 | E 4 | E 4 |
| kJ | 16 | 8 | 5 | — | — | 11 | 14 | 28 | 42 | 4 | 20 | — | 1 | 1 | 21 | 2 | 1 | 17 | 12 | 11 | 13 | 2 | 11 | 40 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 12 | 12 | 4 | 4 | 12 | 12 | 4 | 4 | 12 | 12 |
Best forecast wave conditions in Maui | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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