Surf Forecasts:
How big are the waves at Grandma's today (21 Sep):
- Morning surf: Morning surf (21 Sep, local time) - 2.5ft (0.7m), 14s period with SSW swell.
- Afternoon surf: Afternoon surf (21 Sep, local time) - 2.5ft (0.7m), 13s period with SSW swell.
- Evening surf: Evening surf (21 Sep, local time) - 2.5ft (0.7m), 13s period with S swell.
The current surf forecast for Grandma's at 6PM is: 0.7m 13s primary swell from a South-southwest direction (forecast issued at 01:00pm September 21). An open ocean swell of 0.3m 6s is not directed at the surf break, a second open ocean swell of 0.8m 5s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Sep) | 2.5ft (0.7m) | 14s |
| Afternoon (21 Sep) | 2.5ft (0.7m) | 13s |
| Evening (21 Sep) | 2.5ft (0.7m) | 13s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 25°C on Mon night). Wind will be generally light. | |||||||||||||||||||||
Mon 21 | Tuesday 22 | Wednesday 23 | |||||||||||||||||||
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 14 | SSW 13 | SSW 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 12 | S 13 | S 13 | SW 17 | SW 17 | SSW 17 | SW 16 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 195 | 187 | 184 | 171 | 171 | 168 | 121 | 119 | 112 | 110 | 108 | 106 | 110 | 119 | 123 | 86 | 85 | 111 | 127 | 122 | 122 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | cross-off | cross-off | cross-off | glassy | glassy | cross-off | off | off | off | cross-off | off | off | off | off | off | off |
High Tide | 12:53PM0.72m | 1:20AM0.41m | 1:33PM0.72m | 2:00AM0.46m | 2:10PM0.71m | ||||||||||||||||
Low Tide | 7:45PM0.14m | 6:26AM0.12m | 8:09PM0.12m | 7:17AM0.11m | 8:32PM0.09m | ||||||||||||||||
 |  | |  |  | | | | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — | — | 6:15 | — | — | — | — | — | — |
 | — | — | 6:22 | — | — | — | — | — | — | — | 6:22 | — | — | — | — | — | — | — | 6:21 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 27 | 26 | 26 | 26 | 25 | 26 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 28 | 28 | 28 | 26 | 26 |
Feels °C | 29 | 30 | 28 | 27 | 29 | 29 | 28 | 29 | 32 | 31 | 31 | 30 | 29 | 29 | 29 | 28 | 30 | 31 | 30 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSW 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 12 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 12 |
| kJ | 195 | 187 | 184 | 171 | 171 | 168 | 121 | 119 | 112 | 110 | 108 | 106 | 110 | 119 | 123 | 86 | 85 | 82 | 76 | 75 | 75 |
Swell 2 Height (m) Direction Period (s) | SW 14 | NNE 6 | N 6 | N 6 | NNE 6 | SE 6 | N 6 | ESE 6 | NNW 12 | NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 11 | SW 17 | SW 17 | SSW 17 | SW 16 | SW 16 | SW 16 |
| kJ | 32 | 6 | 6 | 6 | 6 | 5 | 6 | 3 | 30 | 48 | 46 | 42 | 40 | 23 | 23 | 76 | 75 | 111 | 127 | 122 | 122 |
Swell 3 Height (m) Direction Period (s) | NNE 6 | SW 14 | SW 14 | SW 14 | SW 14 | N 6 | SE 6 | N 13 | SE 6 | SE 6 | SE 6 | SE 6 | SW 17 | SW 17 | SW 17 | NNW 11 | NNW 10 | NNW 10 | N 10 | SE 6 | SE 10 |
| kJ | 7 | 31 | 31 | 31 | 30 | 6 | 5 | 30 | 5 | 9 | 8 | 8 | 73 | 75 | 77 | 22 | 21 | 21 | 33 | 10 | 23 |
Wind waves Height (m) Direction Period (s) | E 9 | — | E 5 | E 9 | E 9 | E 6 | E 8 | E 6 | E 6 | E 6 | E 9 | N 4 | E 10 | E 10 | E 10 | E 10 | E 10 | E 6 | E 6 | E 9 | E 9 |
| kJ | 343 | — | 32 | 381 | 292 | 72 | 356 | 172 | 125 | 175 | 476 | 2 | 830 | 769 | 623 | 610 | 598 | 78 | 124 | 486 | 367 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 4 | 12 | 12 | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 12 |
Best forecast wave conditions in Maui | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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