Surf Forecasts:
How big are the waves at Grandma's today (21 Jun):
- Morning surf: Morning surf (21 Jun, local time) - 2ft (0.6m), 14s period with S swell.
- Afternoon surf: Afternoon surf (21 Jun, local time) - 2ft (0.6m), 13s period with S swell.
- Evening surf: Evening surf (21 Jun, local time) - 1.5ft (0.5m), 18s period with S swell.
The current surf forecast for Grandma's at 4AM is: 0.6m 14s primary swell from a South direction and 0.4m 18s secondary swell from a Southwest direction (forecast issued at 01:00am June 21). An open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Jun) | 2ft (0.6m) | 14s |
| Afternoon (21 Jun) | 2ft (0.6m) | 13s |
| Evening (21 Jun) | 1.5ft (0.5m) | 18s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 4mm), mostly falling on Tue afternoon. Warm (max 27°C on Sun morning, min 23°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Sunday 21 | Monday 22 | Tuesday 23 | ||||||||||||||||||||||
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 18 | S 14 | S 14 | S 13 | S 19 | S 13 | S 13 | S 18 | S 18 | S 18 | S 18 | SSW 17 | S 16 | S 16 | S 16 | S 16 | SSW 16 | SSW 16 | SSW 15 | SSW 18 | SSW 15 | SSW 15 | SSW 19 | SSW 19 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 78 | 150 | 136 | 127 | 192 | 125 | 121 | 160 | 160 | 158 | 158 | 97 | 132 | 131 | 131 | 131 | 86 | 86 | 73 | 61 | 42 | 73 | 124 | 124 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | glassy | off | cross-off | cross-off | off | off | cross-off | cross-off | glassy | glassy | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | glassy | glassy | off | cross-off |
High Tide | 10:24AM0.43m | 9:30PM0.48m | 11:24AM0.51m | 10:22PM0.41m | 12:17PM0.59m | |||||||||||||||||||
Low Tide | 3:31AM0.01m | 3:17PM0.23m | 4:07AM-0.00m | 4:57PM0.26m | 4:42AM-0.01m | 6:40PM0.24m | ||||||||||||||||||
 | |  | | | | | | | | | | | | | | | | |  |  |  |  | | |
 | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:09 | — | — | — | — | — | — | — | 7:09 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 1 | — |
Temp °C | 25 | 24 | 25 | 27 | 27 | 27 | 25 | 24 | 24 | 24 | 25 | 27 | 27 | 26 | 24 | 24 | 24 | 23 | 25 | 26 | 26 | 26 | 26 | 25 |
Feels °C | 28 | 26 | 27 | 29 | 29 | 28 | 25 | 25 | 26 | 26 | 27 | 29 | 29 | 27 | 23 | 24 | 25 | 24 | 26 | 28 | 29 | 29 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 18 | S 13 | S 12 | S 12 | S 12 | S 16 | S 16 | S 16 | SSW 16 | SSW 16 | S 12 | S 12 | SSW 15 | SSW 15 | SSW 15 | SSW 19 |
| kJ | 67 | 150 | 136 | 127 | 125 | 123 | 121 | 84 | 160 | 78 | 74 | 71 | 69 | 131 | 131 | 131 | 86 | 86 | 43 | 24 | 42 | 73 | 76 | 124 |
Swell 2 Height (m) Direction Period (s) | S 15 | SW 18 | SSW 20 | SSW 19 | S 19 | SSW 19 | SSW 19 | S 18 | S 13 | S 18 | S 18 | SSW 17 | S 16 | S 12 | S 12 | S 12 | S 12 | S 12 | SSW 15 | S 15 | S 11 | N 7 | SSW 19 | SSW 16 |
| kJ | 67 | 79 | 75 | 125 | 192 | 125 | 118 | 160 | 82 | 158 | 158 | 97 | 132 | 44 | 44 | 44 | 44 | 24 | 73 | 38 | 22 | 9 | 124 | 82 |
Swell 3 Height (m) Direction Period (s) | SW 18 | ESE 5 | SSW 18 | N 8 | SW 16 | SSW 16 | N 7 | SW 16 | SW 16 | SE 5 | SE 5 | SSW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SE 5 | SSW 14 | N 8 | SSW 18 | N 7 | S 11 | N 8 | SE 6 |
| kJ | 78 | 2 | 30 | 5 | 10 | 25 | 9 | 65 | 40 | 7 | 4 | 21 | 33 | 33 | 33 | 33 | 7 | 21 | 4 | 61 | 10 | 22 | 10 | 8 |
Wind waves Height (m) Direction Period (s) | E 4 | E 4 | E 4 | — | NNE 7 | NNE 3 | E 5 | ESE 5 | E 5 | E 5 | ESE 5 | E 5 | NNE 4 | NNE 5 | NNE 3 | NNE 3 | E 5 | ESE 4 | — | — | S 4 | E 7 | E 5 | E 6 |
| kJ | 33 | 18 | 8 | — | 18 | 3 | 51 | 42 | 59 | 61 | 29 | 27 | 4 | 9 | 4 | 4 | 64 | 16 | — | — | 3 | 80 | 83 | 108 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 12 | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 4 | 4 |
Best forecast wave conditions in Maui | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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