Surf Forecasts:
How big are the waves at Coast Guard today (18 Aug):
- Morning surf: Morning surf (18 Aug, local time) - 4.5ft (1.3m), 8s period with ENE swell.
- Afternoon surf: Afternoon surf (18 Aug, local time) - 4.5ft (1.3m), 8s period with ENE swell.
- Evening surf: Evening surf (18 Aug, local time) - 4.5ft (1.3m), 8s period with ENE swell.
The current surf forecast for Coast Guard at 6AM is: 1.4m 8s primary swell from a East-northeast direction and 0.3m 11s secondary swell from a West direction (forecast issued at 01:00am August 18). An open ocean swell of 0.3m 13s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Aug) | 4.5ft (1.3m) | 8s |
| Afternoon (18 Aug) | 4.5ft (1.3m) | 8s |
| Evening (18 Aug) | 4.5ft (1.3m) | 8s |
Table - waves today at Coast Guard. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 26°C on Tue morning, min 25°C on Tue morning). Mainly fresh winds. | ||||||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||||||||||
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) | W 11 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NNE 7 | ENE 7 | ENE 7 | NE 7 | NE 7 | NE 7 | NE 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 10 | 232 | 196 | 196 | 196 | 245 | 220 | 207 | 212 | 206 | 176 | 183 | 212 | 220 | 209 | 204 | 161 | 41 | 73 | 71 | 119 | 73 | 77 | 77 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off |
High Tide | 7:38AM0.63m | 5:07PM0.51m | 9:12AM0.63m | 10:57AM0.66m | ||||||||||||||||||||
Low Tide | 00:11AM0.16m | 1:29PM0.47m | 00:40AM0.18m | 1:22AM0.20m | ||||||||||||||||||||
 |  |  | | | | | | | | | | | | | | | |  | | | | | | |
 | — | 6:03 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:49 | — | — | — | — | — | — | — | 6:49 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 23 | 23 | 24 | 25 | 25 | 24 | 24 | 24 | 25 | 25 | 27 | 26 | 26 | 26 | 24 | 25 | 26 | 27 | 26 | 28 | 28 | 28 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SW 16 | SW 17 | SW 17 | SW 18 | SW 18 | SW 18 | WNW 13 | WNW 12 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | E 8 | ENE 7 | ENE 7 | SW 18 | E 7 | E 7 | E 7 |
| kJ | 36 | 34 | 43 | 45 | 77 | 79 | 80 | 49 | 33 | 29 | 67 | 67 | 68 | 64 | 66 | 67 | 67 | 90 | 73 | 71 | 152 | 38 | 27 | 27 |
Swell 2 Height (m) Direction Period (s) | W 11 | W 11 | S 13 | WNW 11 | S 13 | SSW 13 | SSW 13 | W 13 | SW 18 | SSW 18 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | W 12 | W 11 | SW 17 | SW 18 | NNE 6 | W 11 | SW 17 | SW 17 | SW 16 |
| kJ | 10 | 22 | 30 | 25 | 30 | 34 | 34 | 30 | 49 | 30 | 28 | 28 | 28 | 28 | 28 | 24 | 22 | 72 | 108 | 23 | 21 | 148 | 137 | 132 |
Swell 3 Height (m) Direction Period (s) | W 6 | SSW 16 | W 11 | SSW 13 | W 11 | W 11 | W 13 | SSW 13 | SSW 13 | S 12 | NNE 7 | S 12 | SSW 12 | SW 19 | SSW 19 | S 12 | S 12 | W 11 | W 11 | SW 18 | W 7 | W 11 | W 11 | W 11 |
| kJ | 3 | 26 | 22 | 34 | 10 | 10 | 14 | 34 | 17 | 12 | 5 | 11 | 14 | 55 | 37 | 11 | 11 | 22 | 9 | 152 | 4 | 21 | 21 | 21 |
Wind waves Height (m) Direction Period (s) | ENE 5 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NNE 7 | NNE 7 | — | NE 7 | NE 7 | NE 7 | NE 7 |
| kJ | 118 | 232 | 196 | 196 | 196 | 245 | 220 | 207 | 212 | 206 | 176 | 183 | 212 | 220 | 209 | 204 | 161 | 41 | 30 | — | 119 | 73 | 77 | 77 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 70 | 70 | 70 | 68 | 70 | 70 | 23 | 54 | 54 | 68 | 23 | 68 | 68 | 23 | 23 | 23 | 34 | 23 | 23 | 23 | 23 | 23 | 34 | 0 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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