Surf Forecasts:
Number Fours surf forecast from 21 Oct 2026:
- Best quality surf: Thursday 22 Oct, 5AM (local time) - 4.5ft (1.4m), 8s period, ENE swell with cross-offshore winds.
- Most powerful swell: Tuesday 20 Oct, 8PM (local time) - 7.5ft (2.3m), 8s period, ENE swell with 588 kJ wave energy.
- Next surfable swell (1★+): Thursday 22 Oct, 5AM (local time) - 4.5ft (1.4m), 8s period with ENE swell.
Best Forecast Surf Conditions for Number Fours this week:
The surf forecast for Number Fours over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Oct 22) at 5AM. The primary swell is predicted to be 1.4m and 8s period with a secondary swell of 0.4m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Number Fours in the next 16 days are 2.3m 8s and forecast to arrive on Tuesday (Oct 20) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 10s period and expected on Sunday (Oct 25) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 22nd Oct) | 4.5ft (1.4m) 8s |
| Best Surf | 5AM (Thu 22nd Oct) | 4.5ft (1.4m) 8s |
| Most Powerful | 8PM (Tue 20th Oct) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
Short Range ForecastMostly dry. Warm (max 26°C on Thu morning, min 24°C on Wed morning). Winds decreasing (strong winds from the ENE on Tue afternoon, light winds from the ENE by Wed night). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 23°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Tue 20 | Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | Monday 26 | ||||||||||||||
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) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | S 18 | SSW 14 | SSW 17 | S 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 588 | 574 | 358 | 310 | 256 | 186 | 138 | 71 | 183 | 158 | 83 | 156 | 280 | 216 | 222 | 350 | 266 | 228 | 360 | 201 |
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 |
High Tide | 1:10AM0.37m | 12:44PM0.54m | 1:42AM0.45m | 1:19PM0.51m | 2:15AM0.52m | 1:54PM0.48m | 2:50AM0.60m | 2:29PM0.43m | 3:27AM0.67m | 3:06PM0.38m | 4:08AM0.72m | 3:44PM0.32m | 4:53AM0.75m | |||||||
Low Tide | 7:10PM0.09m | 6:23AM0.19m | 7:28PM0.07m | 7:20AM0.16m | 7:47PM0.04m | 8:13AM0.15m | 8:09PM0.02m | 9:06AM0.13m | 8:33PM-0.01m | 10:00AM0.12m | 9:01PM-0.02m | 10:58AM0.12m | 9:31PM-0.03m | |||||||
 |  | | | | | | | | |  | |  | | | | |  | |  | |
 | — | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — |
 | 6:02 | — | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 5:59 | — | — | 5:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 24 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 24 | 25 | 25 | 24 | 24 | 25 | 24 | 24 | 24 | 25 |
Feels °C | 21 | 20 | 22 | 21 | 23 | 26 | 26 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | N 10 | SW 16 | SW 16 | SSW 15 | ENE 8 | ENE 8 | ENE 8 | NE 8 | E 13 | NE 12 | ENE 8 | NE 10 | SSW 14 | NNW 12 | NNW 11 | SSW 16 | SSW 16 | SSW 15 | N 11 | N 10 |
| kJ | 18 | 63 | 61 | 85 | 256 | 186 | 138 | 82 | 84 | 69 | 83 | 96 | 280 | 186 | 156 | 350 | 266 | 228 | 223 | 183 |
Swell 2 Height (m) Direction Period (s) | S 11 | N 10 | S 12 | SSE 6 | SW 15 | SW 14 | SW 14 | SW 13 | NE 13 | E 13 | NE 11 | S 18 | NE 10 | NE 9 | S 18 | S 9 | NNW 10 | N 12 | SSW 15 | SSW 14 |
| kJ | 21 | 17 | 26 | 7 | 54 | 52 | 47 | 45 | 60 | 84 | 57 | 156 | 74 | 83 | 222 | 6 | 78 | 101 | 360 | 201 |
Swell 3 Height (m) Direction Period (s) | SSW 14 | S 11 | N 9 | N 9 | SSE 6 | E 13 | E 13 | E 12 | SW 13 | SSW 16 | E 12 | SSW 13 | E 7 | SSW 17 | SSW 13 | E 10 | S 11 | N 10 | E 7 | NW 15 |
| kJ | 20 | 21 | 7 | 6 | 3 | 13 | 32 | 27 | 43 | 80 | 44 | 65 | 27 | 216 | 127 | 8 | 64 | 71 | 24 | 109 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — | E 8 | ENE 8 | ENE 8 | NE 4 | ENE 8 | NE 4 | E 7 | ENE 7 | NNE 10 | ENE 5 | E 4 | — | NE 4 |
| kJ | 588 | 574 | 358 | 310 | — | — | — | 71 | 183 | 158 | 21 | 85 | 9 | 40 | 61 | 292 | 27 | 9 | — | 12 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 156 | 39 | 31 | 39 | 39 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 48 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Number Fours surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Number Fours Surf forecast
The above surf forecast table for Number Fours provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Number Fours can be found by selecting the local surf guide option on the grey menu. Our Number Fours 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 (Number Fours) 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 Number Fours 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.
Number Fours is 5 km (3 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.
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