Surf Forecasts:
Nanwan Beach (South Bay) surf forecast from 9 Jul 2026:
- Best quality surf: Friday 10 Jul, 2AM (local time) - 16ft (5.0m), 18s period, E swell with offshore winds.
- Most powerful swell: Friday 10 Jul, 5AM (local time) - 16ft (5.0m), 17s period, E swell with 15,221 kJ wave energy.
- Next surfable swell (1★+): Friday 10 Jul, 2AM (local time) - 16ft (5.0m), 18s period with E 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 Friday (Jul 10) at 2AM. The primary swell is predicted to be 5.0m and 18s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Nanwan Beach (South Bay) in the next 16 days are 5.0m 17s and forecast to arrive on Friday (Jul 10) at 5AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.0m 10s period and expected on Saturday (Jul 11) at 8AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 10th Jul) | 16ft (5.0m) 18s |
| Best Surf | 2AM (Fri 10th Jul) | 16ft (5.0m) 18s |
| Most Powerful | 5AM (Fri 10th Jul) | 16ft (5.0m) 17s |
Table - best surf conditions forecast for Nanwan Beach (South Bay) over the next 16 days.
Short Range ForecastHeavy rain (total 32mm), heaviest during Sat afternoon. Warm (max 30°C on Fri afternoon, min 28°C on Thu night). Winds increasing (calm on Thu night, severe gales from the WNW by Sat morning). | Days 5-7 Weather SummaryHeavy rain (total 86mm), heaviest during Mon morning. Warm (max 29°C on Sun night, min 27°C on Mon night). Winds decreasing (fresh winds from the SSW on Sun night, calm by Mon night). | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thu 16 | |||||||||||||||
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) | E 18 | E 16 | E 16 | ENE 16 | W 9 | WSW 9 | SW 10 | SW 9 | SW 9 | SW 9 | SSW 9 | SSW 10 | SSW 10 | SW 10 | SW 10 | SW 10 | SSW 9 | SSW 10 | SW 10 | SW 9 | SSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 14322 | 10345 | 12360 | 0 | 3884 | 3106 | 4162 | 2306 | 1769 | 1275 | 969 | 963 | 838 | 710 | 784 | 696 | 460 | 490 | 600 | 424 | 440 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 2:21AM1.01m | 3:54PM0.55m | 3:17AM1.13m | 5:27PM0.54m | 4:13AM1.24m | 6:34PM0.53m | 5:08AM1.34m | 7:23PM0.52m | 6:01AM1.40m | 8:03PM0.52m | 6:53AM1.42m | 8:40PM0.52m | 7:43AM1.39m | ||||||||
Low Tide | 9:59AM0.26m | 7:53PM0.45m | 11:11AM0.13m | 8:45PM0.46m | 12:10PM0.02m | 9:41PM0.45m | 1:03PM-0.05m | 10:38PM0.43m | 1:53PM-0.07m | 11:34PM0.39m | 2:39PM-0.05m | 00:28AM0.36m | 3:21PM0.01m | ||||||||
 |  |  |  |  | | | | | | | | | | | | | |  | | | |
 | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — |
 | 6:44 | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 |
mm | — | — | 4 | 3 | 6 | 7 | 2 | 4 | 6 | 23 | 21 | 17 | 7 | 1 | 1 | 10 | 4 | 2 | — | 1 | 2 |
Temp °C | 29 | 29 | 30 | 29 | 29 | 30 | 30 | 29 | 29 | 29 | 29 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 29 |
Feels °C | 32 | 28 | 32 | 32 | 21 | 25 | 26 | 28 | 29 | 30 | 31 | 32 | 33 | 33 | 31 | 31 | 32 | 31 | 31 | 33 | 32 |
Swell 1 Height (m) Direction Period (s) | E 18 | E 16 | E 16 | ENE 16 | ENE 15 | NE 14 | SE 12 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SSW 10 | SW 10 | SW 10 | SW 10 | SSW 9 | SSW 10 | SW 10 | SW 9 | SSW 9 |
| kJ | 14322 | 10345 | 12360 | 11123 | 4904 | 1787 | 144 | 184 | 204 | 154 | 78 | 62 | 838 | 710 | 784 | 696 | 460 | 490 | 600 | 424 | 440 |
Swell 2 Height (m) Direction Period (s) | — | SW 7 | WNW 7 | — | — | SE 14 | NE 12 | E 10 | E 9 | E 8 | E 8 | E 8 | SE 8 | SE 7 | ESE 7 | SE 7 | SE 7 | SE 7 | E 9 | E 9 | E 9 |
| kJ | — | 25 | 218 | — | — | 29 | 75 | 18 | 15 | 12 | 10 | 18 | 69 | 49 | 31 | 24 | 19 | 14 | 16 | 15 | 27 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SE 14 | ENE 11 | — | — | — | — | E 10 | E 7 | ESE 9 | E 9 | ENE 9 | E 6 | E 6 | SE 7 | E 5 | E 5 |
| kJ | — | — | — | — | — | 48 | 25 | — | — | — | — | 2 | 15 | 8 | 7 | 17 | 6 | 6 | 9 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | — | NW 5 | — | NW 8 | W 9 | WSW 9 | SW 10 | SW 9 | SW 9 | SW 9 | SSW 9 | SSW 10 | — | — | — | — | — | — | — | — | — |
| kJ | — | 106 | — | 1382 | 3884 | 3106 | 4162 | 2306 | 1769 | 1275 | 969 | 963 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 390 | 661 | 390 | 148 | 693 | 329 | 329 | 329 | 375 | 511 | 2 | 375 | 859 | 859 | 442 | 316 | 838 | 535 | 678 | 838 |
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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