Surf Forecasts:
Number Fours surf forecast from 4 Jul 2026:
- Most powerful swell: Tuesday 7 Jul, 5AM (local time) - 7.5ft (2.3m), 8s period, ENE swell with 576 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 8s and forecast to arrive on Tuesday (Jul 07) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 13s period and expected on Friday (Jul 10) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Tue 7th Jul) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
Updates in hr min s Forecast update imminent
Right, let’s have a look at Number Fours. It’s a reef break that’s fairly consistent, and it’s exposed to that south-southeast swell direction. The water’s sitting at 80°F which is about normal for this time of year, so no surprises there.
The outlook starts off with a bit of a tease. On Saturday the 4th, we’ve got a small, clean 2ft south swell rolling in with a very long 20 to 21 second period. The wind is cross-off from the east-northeast at 18 mph, which is a decent combo. The combined energy is moderate (865). It’s tiny, but that long period makes it super clean—if you’ve got a log, it’s worth a paddle. But honestly, the score is low and the tide could be tricky, so it’s not a standout.
Then things go downhill fast. From Sunday the 5th all the way through to Saturday the 12th, it’s pretty much a write-off. The swell gets messy, jumping up to 7ft to 7ft, but it’s coming from the east-northeast with a short, weak period of just 7 to 8 seconds, and the wind stays a stiff cross-off. The wave energy is moderate (from 404 to 910), but it’s windy and the wave quality is poor. This is not a surfer’s window—it’s more likely to be a kite session if anything.
There’s a brief flicker on Sunday the 12th morning with a 3ft swell from the southwest, period of 16 seconds, but the wind is still cross-off and the overall rating is marginal. It’s not exciting.
The rest of the 16 days, right through to the 19th, stays in that same low-energy, poor-quality groove. The swell is mostly east-northeast or east, with short periods (7-8 seconds), and the wind is relentless from the east-northeast. The combined energy drops to weak or moderate (100 to 603). The best you can say is the water is clean-looking, but that’s about it.
Truth is, there’s no single standout session in this whole 16-day window. The only glimmer of hope is that first Saturday morning, but it’s too small and marginal to get excited about. If you’re sitting on your hands, the forecasts can change, but right now, this run is a blank. I’d wait for a better window.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat morning, min 24°C on Sat morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Tue morning, min 24°C on Tue morning). Mainly strong winds. | ||||||||||||||||||||
Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | |||||||||||||||
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 8 | S 20 | SSW 19 | SSW 18 | SSW 18 | SSW 16 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 326 | 377 | 486 | 418 | 412 | 371 | 456 | 487 | 498 | 419 | 531 | 482 | 327 | 286 | 312 | 286 | 310 | 236 | 325 | 344 | 456 |
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 | 7:06PM0.55m | 8:31AM0.28m | 7:40PM0.49m | 9:42AM0.35m | 8:17PM0.41m | 10:50AM0.43m | 9:01PM0.34m | 11:51AM0.52m | 10:00PM0.26m | 12:45PM0.61m | 11:18PM0.20m | 1:36PM0.69m | 00:40AM0.17m | ||||||||
Low Tide | 12:01PM0.11m | 2:26AM0.02m | 1:05PM0.17m | 2:56AM0.01m | 2:35PM0.23m | 3:29AM-0.00m | 4:35PM0.25m | 4:06AM-0.02m | 6:43PM0.23m | 4:48AM-0.04m | 8:17PM0.17m | 5:36AM-0.06m | 9:18PM0.12m | ||||||||
 | |  | | | | | |  | | | |  | | | | | | | |  | |
 | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — |
 | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 26 | 25 |
Feels °C | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 20 | 22 | 21 | 21 | 21 | 21 | 21 | 23 | 22 | 21 | 23 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | S 20 | SSW 19 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | S 13 | S 12 | S 12 | ENE 7 | S 12 | W 13 | SW 19 |
| kJ | 212 | 377 | 486 | 418 | 408 | 371 | 337 | 402 | 284 | 280 | 273 | 195 | 192 | 187 | 125 | 112 | 112 | 236 | 71 | 56 | 184 |
Swell 2 Height (m) Direction Period (s) | S 21 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SE 8 | SE 10 | SSE 8 | SSE 8 | W 15 | W 16 | W 14 | S 12 | W 13 | SSW 11 | W 13 |
| kJ | 326 | 162 | 188 | 138 | 79 | 34 | 8 | 8 | 7 | 7 | 3 | 4 | 6 | 6 | 17 | 20 | 36 | 75 | 55 | 42 | 56 |
Swell 3 Height (m) Direction Period (s) | SSW 16 | SSW 11 | E 9 | SSE 11 | SSE 11 | SSE 10 | SSW 13 | W 10 | NW 9 | N 9 | S 10 | — | W 19 | S 18 | SSE 8 | SSE 8 | SSE 8 | W 14 | SSW 21 | SW 21 | S 12 |
| kJ | 25 | 23 | 14 | 11 | 11 | 9 | 17 | 2 | 3 | 2 | 2 | — | 7 | 6 | 7 | 6 | 6 | 35 | 45 | 68 | 42 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 7 | ENE 7 | ENE 7 |
| kJ | 302 | 285 | 294 | 362 | 412 | 344 | 456 | 487 | 498 | 419 | 531 | 482 | 327 | 286 | 312 | 286 | 310 | — | 325 | 344 | 456 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 39 | 31 | 39 | 48 | 39 | 42 | 127 | 39 | 42 | 46 | 31 | 32 | 39 | 31 | 31 | 44 | 33 | 31 | 42 | 31 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.
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