Surf Forecasts:
How big are the waves at Grandma's today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 2ft (0.6m), 17s period with SSW swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 2ft (0.6m), 17s period with SSW swell.
- Evening surf: Evening surf (21 Aug, local time) - 2ft (0.6m), 16s period with SSW swell.
The current surf forecast for Grandma's at 1PM is: 0.6m 17s primary swell from a South-southwest direction and 0.4m 11s secondary swell from a West direction (forecast issued at 07:00am August 21). An open ocean swell of 0.3m 7s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 2ft (0.6m) | 17s |
| Afternoon (21 Aug) | 2ft (0.6m) | 17s |
| Evening (21 Aug) | 2ft (0.6m) | 16s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 30°C on Sat afternoon, min 26°C on Fri night). Wind will be generally light. | |||||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||||||||
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 17 | SW 17 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SW 16 | SW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SSW 16 | SSW 15 | SSW 15 | SSW 15 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 227 | 232 | 193 | 193 | 173 | 169 | 203 | 203 | 171 | 171 | 171 | 169 | 166 | 164 | 162 | 112 | 110 | 109 | 109 | 82 | 89 | 73 | 81 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | on | glassy | glassy | cross-off | cross-off | off | cross-off | glassy | cross-off | cross-off | off | off | cross-off | cross-off | off | glassy | off | off | off | off |
High Tide | 11:57AM0.68m | 11:47PM0.30m | 12:49PM0.72m | 00:48AM0.31m | 1:33PM0.75m | ||||||||||||||||||
Low Tide | 3:49AM0.10m | 7:40PM0.22m | 4:52AM0.09m | 8:14PM0.19m | 5:52AM0.08m | 8:41PM0.16m | |||||||||||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | | | |
 | 6:07 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — |
 | — | — | — | — | 6:51 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:49 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 28 | 27 | 28 | 28 | 27 | 27 | 26 | 27 | 29 | 30 | 29 | 27 | 26 | 26 | 26 | 27 | 29 | 30 | 29 | 26 | 26 |
Feels °C | 30 | 31 | 32 | 30 | 32 | 33 | 30 | 30 | 28 | 29 | 33 | 33 | 33 | 29 | 28 | 29 | 29 | 30 | 32 | 31 | 31 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 17 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SW 16 | SW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SSW 15 | SW 14 | SSW 14 |
| kJ | 227 | 232 | 193 | 193 | 173 | 169 | 203 | 203 | 171 | 171 | 171 | 169 | 166 | 164 | 162 | 112 | 110 | 109 | 109 | 54 | 89 | 52 | 81 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | W 11 | W 11 | W 11 | W 10 | S 13 | S 13 | SSE 13 | S 14 | S 12 | S 12 | S 12 | WNW 10 | ESE 7 | ESE 7 | SSE 13 | SSE 13 | SE 6 | SE 6 | SE 7 | SSW 15 | SSW 15 |
| kJ | 21 | 21 | 21 | 37 | 35 | 32 | 54 | 54 | 59 | 100 | 47 | 47 | 46 | 20 | 18 | 17 | 58 | 58 | 10 | 10 | 13 | 73 | 72 |
Swell 3 Height (m) Direction Period (s) | W 10 | W 10 | S 11 | S 11 | SSE 11 | NNE 7 | W 10 | W 10 | W 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | S 12 | S 12 | WNW 10 | SE 6 | SE 7 | SSE 13 | SSW 16 | SW 15 | SE 7 | ESE 6 |
| kJ | 16 | 16 | 21 | 21 | 40 | 15 | 31 | 31 | 17 | 19 | 19 | 20 | 20 | 25 | 26 | 34 | 10 | 11 | 58 | 82 | 33 | 8 | 8 |
Wind waves Height (m) Direction Period (s) | E 4 | E 5 | E 5 | NNW 7 | NNW 3 | E 6 | E 5 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | NE 2 | NNE 3 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | NNE 5 | E 6 |
| kJ | 8 | 42 | 78 | 9 | 3 | 53 | 82 | 72 | 89 | 105 | 112 | 239 | 260 | 2 | 1 | 228 | 219 | 253 | 255 | 221 | 196 | 2 | 151 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 14 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 4 |
Best forecast wave conditions in Maui | |||||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||||
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