Surf Forecasts:
Radz surf forecast from 16 Aug 2026:
- Best quality surf: Friday 21 Aug, 5AM (local time) - 1.5ft (0.5m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 8AM (local time) - 1.5ft (0.5m), 17s period, SW swell with 135 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 5AM (local time) - 1.5ft (0.5m), 16s period with SW swell.
Best Forecast Surf Conditions for Radz this week:
The surf forecast for Radz over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 5AM. The primary swell is predicted to be 0.5m and 16s period with a secondary swell of 0.6m and 6s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Radz in the next 16 days are 0.5m 17s and forecast to arrive on Friday (Aug 21) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 10s period and expected on Saturday (Aug 15) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 21st Aug) | 1.5ft (0.5m) 16s |
| Best Surf | 5AM (Fri 21st Aug) | 1.5ft (0.5m) 16s |
| Most Powerful | 8AM (Fri 21st Aug) | 1.5ft (0.5m) 17s |
Table - best surf conditions forecast for Radz over the next 16 days.
Short Range ForecastHeavy rain (total 52mm), heaviest during Sun morning. Warm (max 26°C on Sat afternoon, min 24°C on Mon night). Winds decreasing (near gales from the ENE on Sat night, moderate winds from the E by Mon night). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 24°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | ||||||||||||||||||||
Wave Height (m) Direction Period (s) | W 13 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | W 11 | WNW 11 | W 11 | WNW 13 | WNW 13 | WNW 12 | SW 16 | WNW 11 | NE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | NNE 7 | SW 16 |
Wave Graph | ||||||||||||||||||||
13 | 33 | 29 | 28 | 25 | 9 | 12 | 10 | 17 | 34 | 28 | 42 | 25 | 42 | 33 | 34 | 34 | 21 | 29 | 124 | |
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-off |
High Tide | 4:14PM0.64m | 5:10AM0.51m | 4:23PM0.57m | 6:14AM0.52m | 4:19PM0.52m | 7:40AM0.53m | 3:28PM0.49m | 10:00AM0.55m | 11:33AM0.60m | 12:16PM0.64m | ||||||||||
Low Tide | 10:55PM0.18m | 10:31AM0.32m | 11:17PM0.17m | 11:16AM0.40m | 11:40PM0.17m | 12:35PM0.47m | 00:09AM0.17m | 00:51AM0.18m | 2:10AM0.18m | 3:50AM0.17m | ||||||||||
— | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:58 | — | |
mm | 2 | 6 | 29 | 12 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 23 | 22 | 21 | 26 | 25 | 25 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 26 | 27 | 26 | 26 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 9 | SSE 10 | SSE 8 | S 7 | S 14 | SSW 6 | E 9 | NE 8 | WNW 13 | WNW 12 | NE 6 | WNW 11 | E 8 | NNE 6 | E 7 | E 7 | E 9 | ENE 7 | NE 7 |
12 | 15 | 39 | 24 | 9 | 16 | 4 | 15 | 10 | 34 | 28 | 42 | 25 | 82 | 33 | 67 | 53 | 52 | 36 | 60 | |
Swell 2 Height (m) Direction Period (s) | S 13 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | W 11 | S 14 | S 14 | WNW 13 | NE 8 | NE 8 | WNW 12 | SSW 16 | NE 6 | SW 18 | NNE 6 | NNE 6 | NNE 6 | NNE 7 | SW 16 |
14 | 33 | 29 | 28 | 25 | 9 | 16 | 15 | 17 | 10 | 9 | 28 | 25 | 42 | 79 | 34 | 34 | 21 | 29 | 124 | |
Swell 3 Height (m) Direction Period (s) | W 13 | SSW 16 | NNW 8 | S 13 | S 13 | SSW 7 | WNW 11 | W 11 | SSW 17 | SSW 18 | SSW 18 | SW 16 | SSW 19 | SW 16 | W 11 | SW 17 | SSW 16 | ENE 7 | SW 16 | ESE 8 |
13 | 24 | 7 | 13 | 13 | 5 | 12 | 10 | 28 | 30 | 30 | 41 | 35 | 67 | 9 | 76 | 104 | 18 | 64 | 24 | |
Wind waves Height (m) Direction Period (s) | E 10 | E 10 | E 9 | E 8 | E 8 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 8 | ENE 8 | — | E 8 | — | — | — | — | — |
2670 | 3131 | 1761 | 1090 | 565 | 358 | 277 | 210 | 152 | 131 | 126 | 138 | 172 | — | 94 | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 171 | 179 | 97 | 16 | 16 | 32 | 32 | 39 | 30 | 30 | 30 | 8 | 11 | 11 | 16 | 11 | 6 | 6 | 6 | 0 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
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Information about the Radz Surf forecast
The above surf forecast table for Radz provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Radz can be found by selecting the local surf guide option on the grey menu. Our Radz surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Radz) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Radz may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Radz is 22 km (14 miles) from Wahiawa. If you plan a vacation in Oahu, look for hotels and other accommodation in Wahiawa. Wahiawa has rooms for a wide range of budgets as well as car hire and transport links.











