
Surf Forecasts:
Number Fours surf forecast from 23 Jul 2026:
- Most powerful swell: Tuesday 28 Jul, 8PM (local time) - 7.5ft (2.3m), 13s period, ENE swell with 1,677 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 2.3m 13s and forecast to arrive on Tuesday (Jul 28) 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 2.0m 8s period and expected on Saturday (Jul 25) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Tue 28th Jul) | 7.5ft (2.3m) 13s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about Number Fours.
First up, the water temp is hanging around 80°, which is pretty much normal for this time of year, so no surprises there.
Honestly, the outlook starts off a bit of a slow burn. We’ve got some small, choppy, cross-off conditions through the first few days. Wednesday the 22nd through Friday the 24th is mostly small stuff, with a bit of a bump in size on the 24th – we’re looking at waist to chest high waves from the ENE, but the period is short and the wind is a cross-off breeze. The combined energy is moderate (846 to 1035), but the quality just isn’t there for a proper paddle. It’s more of a kite session kind of setup.
Saturday the 25th sees a bit of a mix: a morning of 6ft ENE windswell, but then the afternoon brings a cleaner 3ft groundswell from the SSW with a very long 18-second period. That’s a proper long-period pulse, but it’s pretty tiny. The energy jumps up (1101), but the size is too small to get excited about.
The real standout window opens up on Tuesday the 29th of July. That’s the day. The wind drops right out, turning offshore from the north in the afternoon, and the swell hits 7ft from the ENE with a 12-second period. The combined energy is strong (1405 to 1466) and the conditions are clean. That’s a proper, powerful, well-shaped wave for experienced surfers. If you’re up for a solid, challenging session, that’s your morning and afternoon.
The days around that are a bit of a mixed bag. Wednesday the 30th sees the wind swing onshore, messing up the quality, and the energy drops off. Then from Friday the 31st of July right through to the start of August, the wind howls again. The 1st and 2nd of August pump up to 8ft but with a terrible 7-8 second period and strong cross-off wind. It’s big, messy, and not surfable. The energy is moderate to strong (810 to 983), but the quality is poor.
Then we get a bit of a lull. The 3rd and 4th of August offer some cleaner 3ft to 4ft groundswell from the east with a 15-16 second period. The energy is moderate (1032 to 895). It’s clean, but the size is very small. Could be a grovel board session for the keen.
The 5th of August sees a bit more size, with 5ft from the ENE and a 12-second period, but the wind is still cross-off and the energy is moderate. It’s a better prospect than the immediate days before, but nothing like the 29th.
The best on offer is absolutely the 29th of July – Tuesday morning and afternoon. That’s a solid 7ft groundswell, clean offshore winds, and long-period energy. It’s a proper, heavy, top-shelf session for the experienced crew. The 25th of July (Saturday) afternoon is a distant second, with a tiny but super-long-period pulse that would be great for a point or reef, but it’s small.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri morning. Warm (max 26°C on Fri afternoon, min 24°C on Thu morning). Mainly strong winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 26°C on Sat afternoon, min 24°C on Sat night). Mainly fresh winds. | |||||||||||||||||||
Wed 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | ||||||||||||||
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) | SSW 23 | SSW 22 | ENE 7 | ENE 7 | SSW 18 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | SSW 18 | SSW 18 | ENE 8 | E 15 | E 14 | E 14 | E 13 | ENE 13 | ENE 13 | ENE 13 | ENE 13 |
Wave Graph | ||||||||||||||||||||
426 | 363 | 412 | 395 | 464 | 526 | 394 | 482 | 392 | 572 | 547 | 469 | 520 | 585 | 631 | 680 | 1467 | 1359 | 1497 | 1599 | |
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 | 10:06PM0.22m | 1:02PM0.59m | 11:46PM0.19m | 1:44PM0.62m | 00:59AM0.18m | 2:22PM0.66m | 1:51AM0.19m | 2:56PM0.68m | 2:32AM0.21m | 3:29PM0.70m | 3:10AM0.23m | 3:59PM0.70m | 3:49AM0.25m | |||||||
Low Tide | 8:25PM0.21m | 9:13PM0.17m | 5:34AM0.05m | 9:41PM0.14m | 6:23AM0.04m | 10:05PM0.12m | 7:08AM0.02m | 10:27PM0.11m | 7:51AM0.01m | 10:49PM0.10m | 8:31AM0.01m | 11:11PM0.09m | ||||||||
— | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | |
7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | — | 7:12 | — | |
mm | — | — | — | — | — | 1 | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 |
Feels °C | 21 | 23 | 21 | 21 | 22 | 21 | 22 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 23 | 24 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | E 11 | E 12 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SSW 16 | E 15 | E 14 | E 14 | E 13 | SSW 14 | SSW 14 | SSW 14 | ENE 13 |
123 | 180 | 412 | 395 | 464 | 329 | 340 | 232 | 391 | 572 | 547 | 469 | 520 | 585 | 631 | 680 | 213 | 143 | 189 | 1599 | |
Swell 2 Height (m) Direction Period (s) | SSW 23 | S 13 | S 12 | S 11 | S 11 | S 12 | S 12 | S 20 | SSW 16 | S 11 | E 16 | E 15 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSE 10 | SSE 9 | SSE 8 | S 14 |
426 | 157 | 97 | 125 | 56 | 143 | 102 | 296 | 223 | 61 | 121 | 339 | 452 | 333 | 288 | 222 | 10 | 8 | 6 | 181 | |
Swell 3 Height (m) Direction Period (s) | S 13 | SSW 22 | SSW 16 | E 11 | S 13 | SSW 15 | S 21 | S 12 | S 11 | E 13 | E 12 | S 11 | S 11 | S 10 | S 10 | SSE 10 | NNE 10 | S 10 | S 9 | SW 21 |
125 | 363 | 100 | 86 | 85 | 93 | 231 | 100 | 64 | 54 | 47 | 20 | 20 | 18 | 18 | 10 | 37 | 2 | 2 | 18 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 6 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | NE 7 | NE 7 | ENE 13 | ENE 13 | ENE 13 | NNE 7 |
198 | 167 | 395 | 360 | 414 | 526 | 394 | 482 | 392 | 398 | 471 | 408 | 329 | 279 | 223 | 254 | 1467 | 1359 | 1497 | 138 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 39 | 31 | 42 | 42 | 33 | 39 | 44 | 31 | 39 | 126 | 31 | 31 | 42 | 31 | 31 | 39 | 2 | 1 | 31 | 1 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.










