
Surf Forecasts:
Number Fours surf forecast from 5 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 8AM (local time) - 2.5ft (0.8m), 19s period, S swell with 446 kJ wave energy.
Best Forecast Surf Conditions for Number Fours this week:
The most powerful waves expected at Number Fours in the next 16 days are 0.8m 19s and forecast to arrive on Wednesday (Aug 12) 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 1.4m 6s period and expected on Saturday (Aug 08) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Wed 12th Aug) | 2.5ft (0.8m) 19s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s coming up for Number Fours. I gotta be straight with you – it’s a tough stretch ahead. We’ve got a whole lot of nothing good for a long time.
The first real glimmer of anything halfway decent isn’t until the morning of Wednesday the 13th of August, and even then, it’s a marginal call. The water temp is sitting around 81°, which is pretty much bang on average for this time of year, so no surprises there.
Let’s run through the next week and a bit. From Wednesday the 5th of August right through to Tuesday the 12th of August, it’s a write-off. We’re looking at mostly small, messy, or just plain poor conditions. The wind is hammering from the ENE at 15 to 22 mph, mostly cross-off, but the swell is tiny or confused. The combined wave energy is weak to moderate at best – you’ll see numbers like 165 to 506, which just isn't doing anything for us. There’s a period around the 8th and 9th where the swell bumps up to 5 ft to 6 ft from the ENE, but with a short period of just 7 seconds, it’s going to be fat and weak, not worth the paddle.
Then from Wednesday the 13th onward, things get weird. The swell direction swings to the S and SSW with some long-period energy – 16 to 19 seconds. That sounds promising, but the height is only 2 ft to 4 ft. The combined energy does spike into the 800s and even 1036 on the morning of the 13th, which is moderate to strong energy, but the size is just too small to make it worthwhile. The wind stays stubbornly from the ENE at 19 to 25 mph, keeping everything bumpy and crossed up. The period is so long it might just break too straight at a reef setup like this, and with the wind, it’s a no-go.
After the 14th, the swell picks up again from the ENE, hitting 7 ft to 8 ft, but the period stays around 8 seconds. That’s windswell territory, and with 19 to 25 mph winds, it’s going to be a messy, choppy, blown-out mess. The combined energy is high – up to 937 – but that’s just raw wind power, not surfable waves.
Honestly, the standout – if you can call it that – is the morning of Thursday the 13th of August. It’s the only time the combined energy cracks 1000, and there’s a touch of long-period S swell. But with only 4 ft and ENE cross-off wind, it’s a marginal, one-star sort of day. If you’re desperate, you might find a wave, but I wouldn’t get my hopes up. Crowds at Number Fours are sometimes an issue, but I wouldn’t worry about that here – no one’s going to be out.
The rest of the 16-day run is basically a gap. After the 13th, it’s all poor or marginal conditions right through to the 20th of August. There’s no second week highlight. This setup, with consistent ENE winds and short-period windswell, honestly looks more interesting for kite surfing than paddle surfing.
So, bottom line: keep the board in the car, but maybe leave the wetsuit at home. This one’s a long, flat, windy wait.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Wed morning, min 24°C on Thu night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sat afternoon, min 25°C on Sat morning). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
AM | 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 10 | ENE 9 | ENE 9 | SSW 14 | ENE 8 | ENE 8 | SW 21 | SW 20 | SSW 19 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | S 20 |
Wave Graph | |||||||||||||||||||||
253 | 203 | 190 | 81 | 142 | 107 | 115 | 99 | 148 | 162 | 232 | 273 | 302 | 390 | 328 | 261 | 242 | 276 | 245 | 213 | 373 | |
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 | cross-off |
High Tide | 10:11AM0.53m | 8:07PM0.29m | 11:24AM0.60m | 9:30PM0.22m | 12:27PM0.67m | 11:32PM0.19m | 1:22PM0.73m | 00:59AM0.19m | 2:10PM0.78m | 2:02AM0.22m | 2:54PM0.80m | 2:55AM0.26m | 3:35PM0.79m | 3:43AM0.31m | |||||||
Low Tide | 5:19PM0.27m | 3:10AM0.03m | 7:39PM0.21m | 4:08AM0.02m | 8:34PM0.16m | 5:14AM0.01m | 9:09PM0.12m | 6:20AM-0.01m | 9:40PM0.08m | 7:20AM-0.02m | 10:10PM0.06m | 8:15AM-0.02m | 10:40PM0.05m | ||||||||
6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 25 |
Feels °C | 26 | 25 | 27 | 27 | 24 | 25 | 25 | 24 | 25 | 23 | 24 | 23 | 24 | 24 | 23 | 25 | 25 | 24 | 24 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | ENE 10 | SSW 15 | SSW 14 | ENE 8 | SSW 14 | SW 14 | ENE 5 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | S 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 |
253 | 88 | 82 | 59 | 80 | 102 | 51 | 73 | 105 | 113 | 101 | 99 | 159 | 86 | 131 | 133 | 176 | 186 | 222 | 213 | 243 | |
Swell 2 Height (m) Direction Period (s) | SSW 11 | SSW 11 | SSE 12 | SSW 14 | SSE 11 | SSE 11 | SSW 14 | SSE 11 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SW 16 | SSW 12 | SSW 12 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | S 20 |
38 | 39 | 48 | 81 | 41 | 40 | 77 | 38 | 148 | 162 | 154 | 150 | 96 | 66 | 56 | 56 | 33 | 32 | 16 | 30 | 373 | |
Swell 3 Height (m) Direction Period (s) | SSE 13 | SSE 12 | SSW 10 | SSE 11 | SSW 10 | NNW 7 | SW 21 | SW 20 | NE 11 | NE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 18 | SW 16 | SSE 10 | SSW 11 | SSW 11 | W 10 | S 21 | W 13 |
56 | 49 | 19 | 25 | 9 | 5 | 115 | 99 | 30 | 27 | 19 | 19 | 19 | 102 | 64 | 18 | 25 | 23 | 18 | 79 | 31 | |
Wind waves Height (m) Direction Period (s) | — | ENE 9 | ENE 9 | ENE 6 | ENE 8 | ENE 8 | — | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
— | 203 | 190 | 62 | 142 | 107 | — | 63 | 122 | 158 | 232 | 273 | 302 | 390 | 328 | 261 | 242 | 276 | 245 | 204 | 206 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 1 | 1 | 31 | 31 | 1 | 31 | 1 | 31 | 39 | 39 | 33 | 31 | 31 | 31 | 2 | 31 | 2 | 31 | 32 | 31 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











