Surf Forecasts:
Nanwan Beach (South Bay) surf forecast from 5 Jul 2026:
- Best quality surf: Wednesday 8 Jul, 11PM (local time) - 11ft (3.5m), 19s period, ESE swell with offshore winds.
- Most powerful swell: Friday 10 Jul, 11AM (local time) - 20ft (6.0m), 18s period, E swell with 22,972 kJ wave energy.
- Next surfable swell (1★+): Wednesday 8 Jul, 2AM (local time) - 4.5ft (1.3m), 16s period with ESE swell.
Best Forecast Surf Conditions for Nanwan Beach (South Bay) this week:
The surf forecast for Nanwan Beach (South Bay) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jul 08) at 2AM. The primary swell is predicted to be 1.3m and 16s period with a secondary swell of 0.8m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Nanwan Beach (South Bay) in the next 16 days are 6.0m 18s and forecast to arrive on Friday (Jul 10) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 6.0m 10s period and expected on Saturday (Jul 11) at 5AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 8th Jul) | 4.5ft (1.3m) 16s |
| Best Surf | 11PM (Wed 8th Jul) | 11ft (3.5m) 19s |
| Most Powerful | 11AM (Fri 10th Jul) | 20ft (6.0m) 18s |
Table - best surf conditions forecast for Nanwan Beach (South Bay) over the next 16 days.
Updates in hr min s Forecast update imminent
G’day, Rusty here again, putting it in feet and miles. So for Nanwan Beach, this 16-day outlook has some serious swell, but the timing’s tough.
Monday morning July 6th: tiny 3ft from the SW, onshore wind, combined energy at 158 – weak. Not worth it. Monday afternoon and Tuesday aren’t much better.
Wednesday the 8th: morning has 7ft from the E, 19-second period, cross-shore wind. Energy 3172. Not clean. But Wednesday afternoon? That’s the standout. You’ve got 10ft from the ESE, same 19-second groundswell, a cross-off breeze at 9 mph, and an energy of 6334. It’s clean and punchy. That’s expert territory, so keep the beginners on the sand. Crowds often show here.
Thursday the 9th: morning is 13ft from the E, 18-second period, cross-off wind. Energy 11086. Afternoon is 15ft from the ESE, offshore breeze from the NNW at 9 mph, energy at 11990. Too big for the break—only for experts. Friday the 10th: 20ft from the E and ESE, 18 and 17-second periods, clean offshore winds. Massive, dangerous.
Saturday the 11th gets wiped out by storm-force winds at 59 mph, 20ft messy swell, energy 6467. Poor conditions roll into Sunday and Monday.
From Tuesday the 14th through Saturday the 18th: winds stay onshore or cross-shore, swell drops from 7ft to 5ft. Mostly marginal or poor. Energy drops to 372.
Sunday the 19th: afternoon has 6ft from the SW, 10-second period, a clean breeze from the WNW at 6 mph. Energy 595. Good, clean little session. Monday the 20th and Tuesday the 21st fade back to poor.
Best bet: Wednesday afternoon, July 8th. 10ft clean ESE groundswell, 19-second period, cross-off wind. That’s the one for experienced surfers. For the true chargers, Thursday and Friday have size, but it’s heavy. Sunday the 19th is a small clean option.
Rusty out.
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Warm (max 29°C on Mon morning, min 27°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 63mm), heaviest during Sat afternoon. Warm (max 30°C on Thu afternoon, min 28°C on Wed night). Winds increasing (light winds from the N on Thu night, extremely windy from the W by Sat morning). | ||||||||||||||||||||
Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sun 12 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SW 9 | SW 8 | WSW 8 | E 16 | ESE 15 | E 15 | ESE 16 | E 19 | ESE 19 | ESE 18 | E 18 | ESE 18 | E 18 | E 18 | E 17 | SW 9 | WSW 10 | SW 10 | SW 11 | SW 10 | SW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 152 | 112 | 114 | 193 | 360 | 619 | 849 | 3100 | 6273 | 7913 | 11086 | 11990 | 17978 | 22972 | 19930 | 120 | 6467 | 6185 | 6224 | 3718 | 2948 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | on | on | on | glassy | cross | cross-off | off | cross-off | off | cross-off | cross-off | off | cross-off | cross | cross | cross-on | cross-on | cross-on |
High Tide | 11:03PM0.63m | 10:15AM0.96m | 11:47PM0.71m | 11:08AM0.84m | 00:35AM0.79m | 12:21PM0.72m | 1:27AM0.90m | 2:01PM0.61m | 2:21AM1.01m | 3:54PM0.55m | 3:17AM1.13m | 5:27PM0.54m | 4:13AM1.24m | 6:34PM0.53m | |||||||
Low Tide | 3:38AM0.46m | 5:25PM0.27m | 4:58AM0.47m | 5:56PM0.32m | 6:39AM0.45m | 6:30PM0.37m | 8:27AM0.38m | 7:08PM0.41m | 9:59AM0.26m | 7:53PM0.45m | 11:11AM0.13m | 8:45PM0.46m | 12:10PM0.02m | ||||||||
 |  | |  | | | | | | | |  |  | | |  |  | |  | | | |
 | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — |
 | 6:44 | — | 6:44 | — | — | 6:44 | — | — | 6:44 | — | — | 6:44 | — | — | 6:44 | — | — | 6:44 | — | — | 6:43 |
mm | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | 7 | 22 | 34 | 14 | 3 | 4 |
Temp °C | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 30 | 30 | 30 | 28 | 29 | 29 | 29 | 29 |
Feels °C | 32 | 31 | 32 | 33 | 33 | 32 | 34 | 33 | 32 | 32 | 31 | 31 | 33 | 32 | 34 | 35 | 16 | 24 | 24 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 8 | WSW 8 | SW 8 | ESE 15 | E 15 | ESE 16 | E 19 | ESE 19 | ESE 18 | E 18 | ESE 18 | E 18 | E 18 | E 17 | ENE 16 | NE 14 | NE 13 | SE 11 | SE 11 | SE 10 |
| kJ | 152 | 112 | 114 | 91 | 360 | 619 | 849 | 3100 | 6273 | 7913 | 11086 | 11990 | 17978 | 22972 | 19930 | 9521 | 1408 | 100 | 80 | 140 | 153 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 16 | SW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 7 | WSW 7 | — | — | — | — | WNW 8 | SW 9 | — | SE 12 | ENE 10 | E 9 | — |
| kJ | 39 | 38 | 39 | 193 | 88 | 74 | 74 | 72 | 61 | 49 | — | — | — | — | 184 | 120 | — | 47 | 10 | 15 | — |
Swell 3 Height (m) Direction Period (s) | SSE 4 | ESE 9 | ESE 18 | E 9 | E 9 | E 9 | E 8 | — | — | — | — | — | — | — | SW 8 | — | — | SE 11 | — | W 12 | — |
| kJ | 2 | 7 | 64 | 39 | 38 | 23 | 33 | — | — | — | — | — | — | — | 57 | — | — | 46 | — | 11 | — |
Wind waves Height (m) Direction Period (s) | — | SSE 4 | — | — | — | — | — | — | — | — | — | — | — | WNW 6 | NW 8 | WNW 9 | WSW 10 | SW 10 | SW 11 | SW 10 | SW 10 |
| kJ | — | 1 | — | — | — | — | — | — | — | — | — | — | — | 229 | 1048 | 4680 | 6467 | 6185 | 6224 | 3718 | 2948 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 694 | 14 | 42 | 316 | 14 | 0 | 2 | 0 | 2 | 2 | 2 | 442 | 390 | 671 | 390 | 148 | 639 | 378 | 1253 | 329 |
Best forecast wave conditions in South Taiwan | |||||||||||||||||||||
Best forecast wave conditions in Taiwan | |||||||||||||||||||||
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Information about the Nanwan Beach (South Bay) Surf forecast
The above surf forecast table for Nanwan Beach (South Bay) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nanwan Beach (South Bay) can be found by selecting the local surf guide option on the grey menu. Our Nanwan Beach (South Bay) 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 (Nanwan Beach (South Bay)) 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 Nanwan Beach (South Bay) 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.
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