Surf Forecasts:
How big are the waves at Waimanalo today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 2.5ft (0.7m), 8s period with E swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 3.5ft (1.1m), 7s period with NE swell.
- Evening surf: Evening surf (20 Aug, local time) - 4ft (1.2m), 7s period with ENE swell.
The current surf forecast for Waimanalo at 5AM is: 0.8m 8s primary swell from a East direction and 0.9m 6s secondary swell from a Northeast direction (forecast issued at 01:00am August 20). The wind direction is predicted to be onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 2.5ft (0.7m) | 8s |
| Afternoon (20 Aug) | 3.5ft (1.1m) | 7s |
| Evening (20 Aug) | 4ft (1.2m) | 7s |
Table - waves today at Waimanalo. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 25°C on Thu morning). Winds increasing (light winds from the E on Thu night, strong winds from the ENE by Sat night). | ||||||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 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) | E 8 | E 8 | E 8 | NE 7 | NE 7 | ENE 7 | ENE 7 | NE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | E 7 | E 6 | E 6 | E 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 102 | 78 | 78 | 73 | 105 | 138 | 138 | 122 | 71 | 52 | 51 | 99 | 99 | 136 | 94 | 75 | 135 | 134 | 143 | 175 | 206 | 239 | 276 | 284 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on |
High Tide | 11:48AM0.51m | 12:32PM0.55m | 1:04PM0.58m | 10:27PM0.27m | ||||||||||||||||||||
Low Tide | 1:15AM0.09m | 2:41AM0.09m | 4:16AM0.08m | 9:18PM0.23m | ||||||||||||||||||||
 | |  | | | | | | | | | | |  | | |  | | | | | | | | |
 | — | 6:09 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:55 | — | — | — | — | — | — | — | 6:54 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 26 | 26 | 27 | 26 | 26 | 25 | 25 | 25 | 26 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 |
Feels °C | 26 | 27 | 27 | 28 | 27 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 27 | 28 | 28 | 27 | 25 | 24 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | E 8 | NE 6 | NNE 6 | NE 7 | NE 7 | ENE 7 | ENE 7 | NE 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 | SSW 17 | E 9 | NNE 7 | NNE 7 | SSW 16 | ESE 8 | ESE 8 | SSE 15 | SSW 16 | SSW 16 | SSW 16 | SSW 16 |
| kJ | 102 | 58 | 52 | 73 | 105 | 138 | 138 | 122 | 71 | 52 | 51 | 55 | 29 | 6 | 29 | 30 | 50 | 14 | 21 | 42 | 25 | 25 | 24 | 24 |
Swell 2 Height (m) Direction Period (s) | NE 6 | E 8 | E 8 | E 8 | E 8 | SSW 18 | SSW 17 | SSW 16 | NNE 7 | NNE 6 | NNE 7 | E 7 | E 9 | SSW 16 | E 8 | E 8 | S 13 | SSW 16 | SSE 14 | SSW 16 | S 13 | S 12 | S 12 | WNW 13 |
| kJ | 58 | 78 | 78 | 55 | 30 | 30 | 28 | 27 | 41 | 35 | 44 | 37 | 13 | 25 | 12 | 12 | 14 | 51 | 38 | 26 | 13 | 12 | 12 | 17 |
Swell 3 Height (m) Direction Period (s) | S 12 | S 12 | SSW 18 | SSW 18 | SSW 18 | S 12 | S 12 | S 12 | SSW 17 | SSW 17 | SSW 17 | SSW 17 | S 14 | SSE 8 | SSW 16 | SSW 16 | SSE 16 | S 13 | SSW 16 | S 8 | SSE 15 | SSE 15 | SSE 15 | S 12 |
| kJ | 11 | 11 | 30 | 31 | 31 | 10 | 11 | 10 | 27 | 29 | 29 | 29 | 16 | 7 | 25 | 25 | 24 | 13 | 26 | 1 | 21 | 21 | 21 | 12 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | E 7 | E 6 | E 6 | E 7 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 99 | 99 | 136 | 94 | 75 | 135 | 134 | 143 | 175 | 206 | 239 | 276 | 284 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 14 | 9 | 9 | 14 | 14 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 14 | 9 | 15 | 9 | 9 | 15 | 44 | 50 | 52 | 50 | 50 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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