
Surf Forecasts:
Number Fours surf forecast from 4 Aug 2026:
- Most powerful swell: Tuesday 4 Aug, 2PM (local time) - 4.5ft (1.4m), 11s period, ENE swell with 436 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 1.4m 11s and forecast to arrive on Tuesday (Aug 04) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 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 | 2PM (Tue 4th Aug) | 4.5ft (1.4m) 11s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright, let’s get into it. The next couple of weeks are a bit of a mixed bag, to be honest. We’ve got some punchy swell on the horizon, but the wind is going to be a constant cross-off from the east-northeast, which will keep things a little lumpy. The water temp is sitting at 80.6°, which is about average for this time of year, so no surprises there.
The first few days are pretty underwhelming. Tuesday and Wednesday at Number Fours (Lagos) are small, with waves around 3.6ft to 4.9ft, but the period is short and there’s just not enough push. The energy is moderate, around 555-561, but it’s not going to get your heart racing. Thursday and Friday are even worse, with some tiny 1.3ft leftovers and energy dropping to 151-213. It’s a classic flat spell, and you’d be better off doing something else.
The weekend picks up a little, with Saturday and Sunday seeing 5.2ft to 5.9ft, but the period is still short at 7-8 seconds. The energy is picking up to 514-623, but that short period swell is just not going to give you any real power. It’s all a bit mushy and sections are going to be hard to connect. The wind is fresh, 30 km/h, so it’s going to be a bit of a battle.
The start of the following week, Monday the 11th, is more of the same, with 5.2ft-5.6ft and a short period. The energy is there, but it’s not clean. Then we get a bit of a lull again mid-week, with some bigger period south swell sneaking in, but the heights are only around 3.3ft on the 12th and 13th. The energy is actually getting strong, up to 970-1018, but the wave quality is poor. You’ll see some lines but they aren't breaking well.
The real standout is the following weekend. We’ve got a solid ENE groundswell building through the 15th, but it’s the 16th and 17th that look best. On Sunday the 16th, we’re looking at 9.8ft with an 8-second period, and the energy is strong, hitting 1541-1754. The wind is still cross-off, but the size is there. Monday the 17th is the pick of the bunch, with 11.5ft on the morning and energy at a very strong 2756. The period is still on the short side at 9 seconds, but the power is undeniable. This is for experienced surfers only. At this size, at a reef, you need to know what you’re doing. It’s a serious, heavy wave. The wind will be a factor, but there will be some serious waves to be had.
After that, it starts to back off on the 18th, with 8.2ft, and then drops right away again on the 19th. So, if you want the biggest, most powerful surf, keep your eyes on the 17th. It’s promising, but long-range calls like that are always a bit less certain.
Short Range ForecastMostly dry. Warm (max 27°C on Tue afternoon, min 24°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 24°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 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 11 | ENE 11 | ENE 10 | 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 8 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
515 | 436 | 358 | 253 | 188 | 144 | 81 | 142 | 107 | 115 | 99 | 148 | 239 | 255 | 382 | 349 | 327 | 294 | 310 | 314 | 252 | |
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 | 8:56AM0.47m | 7:27PM0.36m | 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 | |||||||
Low Tide | 2:52PM0.27m | 2:23AM0.03m | 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 | ||||||||
6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:06 | — | — | 7:05 | — | — | 7:05 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 27 | 28 | 26 | 26 | 25 | 25 | 26 | 25 | 24 | 23 | 24 | 24 | 22 | 23 | 23 | 25 | 24 | 24 | 25 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | SW 14 | ENE 8 | SSW 14 | SW 14 | ENE 7 | NE 7 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 17 | SSW 12 | ENE 7 | SSW 15 | SSW 15 | ENE 7 |
515 | 436 | 358 | 253 | 188 | 54 | 45 | 80 | 102 | 21 | 24 | 107 | 113 | 102 | 99 | 159 | 86 | 294 | 133 | 176 | 252 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 15 | SSE 12 | SSW 14 | S 11 | S 11 | SSW 14 | SSW 14 | SSW 19 | SW 18 | SW 18 | SW 18 | SSW 13 | SW 16 | S 16 | SSW 12 | SSE 10 | SSW 16 |
46 | 51 | 47 | 47 | 88 | 48 | 81 | 22 | 21 | 77 | 73 | 148 | 162 | 154 | 150 | 96 | 66 | 131 | 47 | 35 | 188 | |
Swell 3 Height (m) Direction Period (s) | W 13 | SW 16 | SW 15 | SSE 13 | SSW 11 | SSW 10 | SSE 11 | SSW 10 | SSE 7 | SW 21 | SW 20 | NE 11 | NE 11 | SSE 10 | SSE 10 | SSE 10 | SSW 18 | SSW 12 | SSE 10 | SSW 12 | SSE 9 |
30 | 68 | 57 | 56 | 39 | 20 | 25 | 9 | 5 | 115 | 99 | 30 | 19 | 19 | 19 | 19 | 102 | 57 | 38 | 46 | 32 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ENE 9 | ENE 6 | ENE 8 | ENE 8 | ENE 5 | ENE 5 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | ENE 8 | ENE 7 | ENE 7 |
— | — | — | — | — | 144 | 77 | 142 | 107 | 28 | 39 | 145 | 239 | 255 | 382 | 349 | 327 | — | 310 | 314 | 154 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 7 | 1 | 1 | 1 | 1 | 1 | 1 | 31 | 2 | 31 | 31 | 31 | 39 | 34 | 32 | 31 | 31 | 31 | 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.











