Surf Forecasts:
How big are the waves at Waimanalo today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 3.5ft (1.0m), 7s period with NE swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 3.5ft (1.0m), 7s period with NE swell.
- Evening surf: Evening surf (21 Aug, local time) - 3.5ft (1.1m), 7s period with ENE swell.
The current surf forecast for Waimanalo at 1AM is: 0.8m 7s primary swell from a East-northeast direction and 0.8m 6s secondary swell from a North-northeast direction (forecast issued at 07:00pm August 20). The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 3.5ft (1.0m) | 7s |
| Afternoon (21 Aug) | 3.5ft (1.0m) | 7s |
| Evening (21 Aug) | 3.5ft (1.1m) | 7s |
Table - waves today at Waimanalo. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 27°C on Fri afternoon, min 25°C on Thu night). Winds increasing (calm on Fri morning, strong winds from the ENE by Sat night). | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | |||||||||||||||||
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) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 | NE 7 | NE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | E 7 | E 7 | E 7 | E 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 138 | 138 | 71 | 69 | 52 | 79 | 109 | 96 | 117 | 117 | 113 | 158 | 153 | 152 | 180 | 206 | 255 | 316 | 371 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-off | glassy | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on |
High Tide | 12:32PM0.55m | 1:04PM0.58m | 10:27PM0.27m | ||||||||||||||||
Low Tide | 2:41AM0.09m | 4:16AM0.08m | 9:18PM0.23m | ||||||||||||||||
 |  | | | | |  | | | | | | | | | | | |  | |
 | — | — | — | — | 6:11 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | 6:57 | — | — | — | — | — | — | — | 6:55 | — | — | — | — | — | — | — | 6:54 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 25 | 25 | 25 | 26 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 28 | 30 | 30 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 27 | 27 | 28 | 26 | 25 | 23 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 | NE 7 | NE 7 | ESE 8 | ESE 8 | E 8 | SSW 16 | SSW 16 | ESE 8 | SSE 15 | SSW 16 | SSW 16 | SSW 16 | WNW 13 |
| kJ | 138 | 138 | 71 | 69 | 52 | 79 | 109 | 96 | 7 | 7 | 12 | 50 | 51 | 14 | 42 | 25 | 25 | 24 | 35 |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 17 | NNE 7 | NNE 6 | NNE 6 | E 8 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | S 13 | ESE 8 | SSE 14 | SSW 16 | S 13 | S 12 | WNW 14 | SSW 16 |
| kJ | 30 | 28 | 54 | 44 | 45 | 20 | 29 | 29 | 25 | 25 | 25 | 14 | 14 | 38 | 26 | 13 | 12 | 20 | 24 |
Swell 3 Height (m) Direction Period (s) | S 12 | S 12 | SSW 16 | SSW 17 | SSW 17 | SSW 17 | S 15 | E 9 | SSE 8 | SSE 8 | SSE 8 | SSE 16 | S 13 | SSW 16 | SE 8 | SSE 15 | SSE 15 | S 12 | S 12 |
| kJ | 10 | 11 | 27 | 27 | 29 | 29 | 17 | 13 | 7 | 7 | 7 | 24 | 13 | 26 | 3 | 21 | 21 | 12 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | E 7 | E 7 | E 7 | E 7 |
| kJ | — | — | — | — | — | — | — | — | 117 | 117 | 113 | 158 | 153 | 152 | 180 | 206 | 255 | 316 | 371 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 7 | 7 | 7 | 5 | 0 | 0 | 9 | 9 | 14 | 15 | 16 | 44 | 9 | 15 | 45 | 50 | 50 | 50 | 50 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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