Surf Forecasts:
How big are the waves at Grandma's today (20 Jun):
- Morning surf: Morning surf (20 Jun, local time) - 2ft (0.6m), 12s period with S swell.
- Afternoon surf: Afternoon surf (20 Jun, local time) - 1.5ft (0.5m), 15s period with S swell.
- Evening surf: Evening surf (20 Jun, local time) - 1.5ft (0.5m), 15s period with S swell.
The current surf forecast for Grandma's at 4AM is: 0.5m 16s primary swell from a South direction and 0.6m 13s secondary swell from a South direction (forecast issued at 01:00am June 20). An open ocean swell of 0.9m 5s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Jun) | 2ft (0.6m) | 12s |
| Afternoon (20 Jun) | 1.5ft (0.5m) | 15s |
| Evening (20 Jun) | 1.5ft (0.5m) | 15s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 28°C on Sat afternoon, min 23°C on Sun night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 20 | Sunday 21 | Monday 22 | ||||||||||||||||||||||
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) | S 13 | S 16 | S 12 | S 12 | S 16 | S 15 | S 15 | S 15 | 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 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 121 | 134 | 100 | 99 | 124 | 113 | 110 | 110 | 78 | 150 | 136 | 127 | 192 | 125 | 121 | 160 | 160 | 158 | 158 | 97 | 132 | 131 | 131 | 131 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | off | off | off | off | off | off | off | off |
High Tide | 9:18AM0.36m | 8:42PM0.57m | 10:24AM0.43m | 9:30PM0.48m | 11:24AM0.51m | 10:22PM0.41m | ||||||||||||||||||
Low Tide | 2:55AM0.01m | 1:54PM0.17m | 3:31AM0.01m | 3:17PM0.23m | 4:07AM-0.00m | 4:57PM0.26m | ||||||||||||||||||
 | |  | | | | | | | | | | | | | | | | | | | | | | |
 | — | 5:45 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:09 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 27 | 28 | 27 | 25 | 25 | 24 | 24 | 25 | 27 | 27 | 26 | 24 | 24 | 24 | 23 | 25 | 27 | 27 | 26 | 25 | 24 |
Feels °C | 29 | 29 | 27 | 30 | 31 | 29 | 26 | 27 | 26 | 26 | 26 | 28 | 28 | 26 | 23 | 25 | 26 | 25 | 26 | 29 | 28 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 13 | S 18 | S 12 | S 12 | S 16 | S 16 | S 16 | S 16 |
| kJ | 121 | 119 | 100 | 99 | 69 | 67 | 67 | 68 | 67 | 150 | 136 | 127 | 125 | 123 | 121 | 121 | 117 | 158 | 74 | 71 | 132 | 131 | 131 | 131 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | S 16 | SSW 16 | SSW 16 | S 16 | S 15 | S 15 | S 15 | S 15 | SW 18 | SSW 20 | SSW 19 | S 19 | SSW 19 | SSW 19 | S 18 | S 18 | S 13 | S 18 | SSW 17 | S 12 | S 12 | S 12 | S 12 |
| kJ | 90 | 134 | 87 | 86 | 124 | 113 | 110 | 110 | 67 | 79 | 75 | 125 | 192 | 125 | 118 | 160 | 160 | 78 | 158 | 97 | 44 | 69 | 44 | 44 |
Swell 3 Height (m) Direction Period (s) | ESE 5 | ESE 5 | NNW 8 | ESE 5 | N 4 | NNW 8 | NNW 8 | ESE 5 | SW 18 | ESE 5 | SSW 18 | N 8 | N 7 | SSW 16 | NNE 4 | N 7 | SW 16 | SE 4 | SE 5 | SE 5 | SW 15 | N 6 | SW 15 | SE 5 |
| kJ | 3 | 3 | 7 | 2 | 1 | 7 | 6 | 5 | 78 | 2 | 30 | 5 | 4 | 25 | 5 | 9 | 40 | 3 | 6 | 4 | 33 | 7 | 33 | 7 |
Wind waves Height (m) Direction Period (s) | E 5 | E 5 | E 5 | — | E 5 | E 4 | E 5 | E 5 | ESE 5 | E 4 | E 4 | E 7 | NNE 3 | NNE 3 | ESE 4 | E 4 | ESE 4 | ESE 4 | ESE 5 | ESE 5 | NNE 4 | ESE 4 | ESE 5 | E 5 |
| kJ | 50 | 38 | 27 | — | 27 | 30 | 51 | 65 | 42 | 26 | 12 | 44 | 2 | 7 | 24 | 28 | 26 | 34 | 47 | 38 | 2 | 22 | 4 | 77 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 4 | 4 | 4 | 4 | 4 | 4 | 12 | 12 | 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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