
Surf Forecasts:
Number Fours surf forecast from 15 Jul 2026:
- Most powerful swell: Sunday 19 Jul, 2AM (local time) - 6ft (1.8m), 8s period, ENE swell with 375 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 1.8m 8s and forecast to arrive on Sunday (Jul 19) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Wednesday (Jul 15) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 19th Jul) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
G'day, Rusty here, and I gotta be straight with you – this outlook for Number Fours is a bit of a tough one. We're looking at a long 16-day window, but the first week and a half is pretty much a write-off for decent waves. The good news is the water temp is sitting right on 79°, which is dead average for this time of year, so at least when the waves do show, you won't be freezing.
The first real sniff of anything half-decent doesn't come until Wednesday the 23rd of July, and even then it's only a marginal call. For the first week, from the 15th through to the 22nd, you're staring at a whole lot of nothing. The wind is relentless from the east-northeast, blowing 15 to 19 mph, which keeps the surface clean but the swell is tiny and weak. The wave energy is mostly pathetic, with values bouncing around a few hundred (162-730), which is just enough to mess with your head but not enough to get a proper ride. The period on the 22nd afternoon spikes to an insane 23 seconds, but with only 2 ft of swell, it's a tease. That's a groundswell, but it's too weak to do anything with.
Then things start to get interesting. From Thursday the 24th of July, we finally see a bit of life. The swell holds around 2 ft to 3 ft from the SSW, with a decent period of 18 seconds, and the wave energy climbs into the strong range (655-712). It's still marginal, but the wind is a steady cross-off from the ENE, which is clean. The standout, and the only real window you should pencil in, is Saturday the 26th of July. The morning sees a 4 ft swell from the east with a 16-second period, and the wave energy jumps to a powerful 1271. The afternoon gets even better: 4 ft from the east, same period, and the energy hits 1359. The wind is a clean cross-off at 16 mph. That's a proper groundswell, and with that long period, it's going to be a bit fat and straight on the beach break, but Number Fours is a reef, so it should handle it well. That's the best on offer – a solid, clean, moderate-sized swell with plenty of grunt.
After that, the 27th through the 30th churn out more marginal surf. The swell sticks around 3 ft to 5 ft, but the period drops and the energy backs off. The 29th afternoon has a short, punchy 5 ft from the ENE with an 11-second period, which could be a bit messy. The 30th is a write-off again with short-period junk.
So, bottom line: the first 8 days are a blank run. If you're itching for a paddle, keep your eyes on Saturday the 26th of July. That's your best bet. Everything else is a marginal call at best.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Wed afternoon, min 24°C on Wed morning). Winds increasing (light winds from the E on Wed morning, fresh winds from the ENE by Thu afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sat morning, min 24°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||
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) | SW 13 | SW 14 | SSW 16 | SSW 16 | SSW 17 | SW 14 | SW 16 | SSW 16 | SSW 14 | SSW 13 | SSW 14 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 14 | S 16 | S 15 | S 14 | S 14 | S 13 |
Wave Graph | |||||||||||||||||||||
162 | 206 | 314 | 175 | 195 | 211 | 125 | 196 | 149 | 141 | 210 | 375 | 314 | 298 | 167 | 142 | 321 | 271 | 329 | 302 | 273 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | 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 | 5:20PM0.76m | 5:41AM0.26m | 5:59PM0.69m | 6:41AM0.30m | 6:36PM0.61m | 7:44AM0.34m | 7:11PM0.52m | 8:53AM0.38m | 7:45PM0.43m | 10:04AM0.43m | 8:19PM0.34m | 11:13AM0.49m | 8:56PM0.27m | ||||||||
Low Tide | 9:57AM-0.04m | 00:34AM0.01m | 10:49AM0.01m | 1:08AM0.01m | 11:44AM0.08m | 1:42AM0.01m | 12:46PM0.16m | 2:15AM0.02m | 2:03PM0.22m | 2:48AM0.03m | 3:52PM0.27m | 3:23AM0.04m | 6:20PM0.26m | 4:02AM0.05m | |||||||
5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | |
— | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 24 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 26 | 26 | 24 | 25 | 24 | 24 | 24 | 24 | 22 | 25 | 25 | 24 | 23 | 22 | 24 | 24 | 24 | 23 | 24 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | NE 7 | ENE 7 | SSW 16 | W 14 | W 14 | ENE 6 | W 14 | SSW 16 | SSW 14 | SSW 13 | SSW 14 | S 12 | SSW 12 | S 13 | SSW 12 | S 14 | S 16 | ENE 7 | S 14 | S 14 | ENE 7 |
118 | 64 | 314 | 203 | 203 | 145 | 144 | 196 | 147 | 141 | 210 | 112 | 87 | 85 | 45 | 142 | 321 | 111 | 329 | 302 | 131 | |
Swell 2 Height (m) Direction Period (s) | W 15 | W 15 | W 15 | SSW 16 | SSW 13 | SW 14 | SW 16 | W 14 | W 13 | WNW 13 | NNE 7 | W 12 | S 19 | S 18 | S 18 | S 16 | SW 18 | S 15 | E 13 | E 12 | S 13 |
221 | 215 | 212 | 175 | 113 | 211 | 125 | 98 | 90 | 57 | 19 | 28 | 66 | 106 | 97 | 135 | 81 | 271 | 123 | 109 | 273 | |
Swell 3 Height (m) Direction Period (s) | SW 13 | SW 14 | NNE 8 | SSW 13 | SSW 17 | W 14 | NNE 7 | SSW 12 | SW 15 | NNE 7 | WNW 13 | S 20 | W 12 | W 12 | NNE 8 | NNE 8 | E 16 | E 14 | SW 17 | E 7 | E 12 |
162 | 206 | 47 | 113 | 195 | 148 | 20 | 55 | 58 | 17 | 56 | 32 | 25 | 25 | 24 | 23 | 46 | 103 | 73 | 17 | 102 | |
Wind waves Height (m) Direction Period (s) | — | — | ENE 7 | NE 7 | ENE 6 | — | ENE 6 | ENE 7 | ENE 6 | ENE 6 | E 6 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | NE 7 | ENE 7 | NE 7 | — |
— | — | 68 | 109 | 82 | — | 103 | 150 | 149 | 119 | 123 | 375 | 314 | 298 | 167 | 121 | 150 | 79 | 117 | 106 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 31 | 31 | 33 | 31 | 31 | 31 | 32 | 2 | 31 | 39 | 31 | 31 | 31 | 1 | 1 | 31 | 1 | 31 | 39 | 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.










