Surf Forecasts:
How big are the waves at Grandma's today (13 Sep):
- Morning surf: Morning surf (13 Sep, local time) - 2ft (0.6m), 15s period with SSW swell.
- Afternoon surf: Afternoon surf (13 Sep, local time) - 1.5ft (0.4m), 15s period with SW swell.
- Evening surf: Evening surf (13 Sep, local time) - 1.5ft (0.4m), 14s period with SW swell.
The current surf forecast for Grandma's at 9AM is: 0.6m 15s primary swell from a South-southwest direction (forecast issued at 01:00am September 13). An open ocean swell of 0.3m 9s is not directed at the surf break, a second open ocean swell of 0.5m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Sep) | 2ft (0.6m) | 15s |
| Afternoon (13 Sep) | 1.5ft (0.4m) | 15s |
| Evening (13 Sep) | 1.5ft (0.4m) | 14s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 28°C on Tue morning, min 24°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 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) | 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 | SW 21 | SW 21 | SW 21 | SW 20 | SSW 20 | SSW 19 | SW 19 | SW 19 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 64 | 75 | 148 | 60 | 55 | 54 | 54 | 33 | 54 | 78 | 50 | 50 | 124 | 118 | 118 | 117 | 117 | 160 | 210 | 309 | 253 | 251 | 303 | 303 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | glassy | glassy | off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | off | glassy | glassy | off | off | cross-off |
High Tide | 5:30AM0.64m | 5:19PM0.50m | 6:15AM0.66m | 5:52PM0.44m | 7:04AM0.66m | 6:29PM0.37m | ||||||||||||||||||
Low Tide | 11:25AM0.16m | 11:13PM0.06m | 12:19PM0.20m | 11:44PM0.07m | 1:21PM0.24m | |||||||||||||||||||
 | |  | |  | | | | | | | | | |  | | | | | | | | | | |
 | — | 6:11 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:30 | — | — | — | — | — | — | — | 6:30 | — | — | — | — | — | — | — | 6:29 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 24 | 25 | 27 | 27 | 27 | 25 | 25 | 24 | 24 | 25 | 27 | 27 | 27 | 26 | 25 | 25 | 25 | 26 | 28 | 28 | 28 | 27 | 26 |
Feels °C | 27 | 26 | 27 | 30 | 30 | 29 | 26 | 26 | 25 | 25 | 25 | 29 | 29 | 28 | 27 | 27 | 28 | 28 | 28 | 32 | 32 | 31 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SSW 14 | SSW 15 | SSW 12 | SW 15 | SW 15 | NNE 4 | SW 14 | SW 14 | SSW 14 | SW 14 | SW 14 | SW 14 | SW 22 | SSW 14 | SW 13 | SW 21 | SW 21 | SW 21 | SW 20 | SSW 20 | SSW 19 | SW 19 | SW 19 |
| kJ | 44 | 75 | 148 | 60 | 55 | 54 | 6 | 33 | 52 | 78 | 50 | 50 | 50 | 118 | 71 | 45 | 117 | 160 | 210 | 309 | 253 | 251 | 303 | 303 |
Swell 2 Height (m) Direction Period (s) | SW 16 | NNE 9 | NNE 9 | SW 15 | SW 12 | SW 12 | SW 14 | N 5 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | SW 22 | NNE 5 | SW 22 | SW 21 | SW 13 | SSW 13 | SW 13 | SW 13 | SSW 12 | NNE 8 | SW 12 | SW 12 |
| kJ | 64 | 15 | 15 | 57 | 23 | 23 | 54 | 4 | 14 | 14 | 7 | 7 | 124 | 5 | 118 | 117 | 44 | 57 | 43 | 42 | 31 | 19 | 38 | 38 |
Swell 3 Height (m) Direction Period (s) | NNE 9 | SSW 16 | SW 8 | NNE 9 | S 10 | NNE 8 | SW 12 | SSW 12 | SSW 24 | SSW 24 | SSW 11 | SW 9 | NNE 8 | SW 14 | NNE 8 | N 8 | N 8 | N 8 | N 8 | NNE 8 | WSW 8 | SW 12 | SSE 8 | NNE 8 |
| kJ | 15 | 25 | 3 | 15 | 8 | 7 | 23 | 14 | 54 | 54 | 12 | 3 | 13 | 49 | 12 | 10 | 10 | 10 | 5 | 6 | 7 | 38 | 7 | 11 |
Wind waves Height (m) Direction Period (s) | E 4 | E 4 | E 4 | — | NNE 8 | NNE 3 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 | — | E 6 | SSW 7 | E 4 | E 5 | E 4 | E 6 | E 4 | N 8 | W 8 | NNE 8 | E 5 |
| kJ | 16 | 11 | 7 | — | 14 | 5 | 13 | 20 | 22 | 12 | 11 | 10 | — | 18 | 5 | 31 | 28 | 19 | 26 | 15 | 10 | 12 | 23 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 12 | 4 | 4 | 12 | 12 | 4 | 12 | 12 | 12 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
Best forecast wave conditions in Maui | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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