Serangan
Pull to refresh
Swl 3
2.6ft 15s.
144kJ
Swl 2
4.4ft 15s.
401kJ
Swl 1
5.4ft 12s.
349kJ
Wnd
3mph
7mph
Hourly Forecast
Timezone: Asia/Makassar
⏱️s.
⚡️kJ
🔮
🌒
Join Surfnerd+ to check
weekend forecasts
Tuesday 2
Wednesday 3
Thursday 4
Friday 5
Saturday 6
Sunday 7
to unlock wave energy
Tap any forecast cell to see the forecast arrows update on the map.
Surfnerd Logo
Join Surfnerd for free to check this forecast
Join Surfnerd to check forecasts, set your homespot, save and create spots and log your surf sessions.
Sign up with Google

Serangan surf guide

Serangan, also known as Turtle Island, is a surf spot located in Bali. It’s an east-facing beach that works well during the wet season. This spot is pretty popular among surfers, offering a mix of waves that can appeal to different skill levels. After going through a security check to get onto the island, you'll find a laid-back vibe perfect for soaking up some sun before or after a surf session.

The waves here break over dead coral and can deliver both lefts and rights. Ideal swell direction is from the south, and it handles swell sizes from about 2ft (0.6m) to much bigger. You can expect different types of waves, from softer shoulders to more powerful sucky shacks. The best wind direction for this spot is northwest, making it a pretty regular crowd pleaser when those winds are right. Whether it’s low, mid, or high tide, there are waves to catch, but it's generally suited for intermediate surfers.

Serangan draws plenty of swell, and when the conditions align with the right wind, it can get crowded, especially if the surf is good. Even with the rock jetty nearby, it doesn’t significantly impact the surf quality. The chill warung scene adds to the relaxed atmosphere, making it a decent stop for surfers looking for a spot to hang out after hitting the waves.

Surf reports and surf forecasts nearby Serangan

Padang Galak
Unknown Region, Unknown Country
Beach break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Sanur
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Tanjung Sari
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Hyatt Reef
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Serangan
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Kuta Beach
Unknown Region, Unknown Country
Beach break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Kuta Reef
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Sri Lanka
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Jimbaran
Unknown Region, Unknown Country
Beach break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9
Nusa Dua
Unknown Region, Unknown Country
Reef break
Tue 29
Wed 30
Thu 31
Fri 1
Sat 2
Sun 3
Mon 4
Tue 5
Wed 6
Thu 7
Fri 8
Sat 9

Readme

Welcome! If you’re new to surf forecasting, check out this quick guide.

Forecast Cheat Sheet

Short on time? Focus on wave energy. It’s the best single metric to gauge how big and powerful the waves will be.

Click any table cell to jump to that forecast hour. The map will update with forecast arrows, so you can see if wind and swell direction are lining up.

Use the table sidebar to switch units for height and speed.

Log your surf sessions to compare forecasts with real sessions and sharpen future predictions.

On the map, click a metric label to bring that arrow to the front — handy when arrows overlap.

Models and Updates

Surfnerd blends multiple global and local wind and swell models using advanced interpolation and spatial techniques to create an "ensemble" forecast. Forecasts are refreshed hourly.

Surf Predictions

Our AI-driven algorithm scores surf quality, shown by green, orange, and gray dots. Each forecast hour is rated for wind, swell, and tide quality, then combined into an overall score. Here’s the scale:

Perfect
Good
Average
Bad or No Data

Session logs also feed the algorithm — the more you log, the smarter your forecasts get.

With Surfnerd, no more "you should have been here yesterday"

Wind certainty

Wind certainty tells you how much the weather models agree on the forecast.

  • High certainty: Models agree closely; forecast is reliable.
  • Medium certainty: Some disagreement; conditions may shift slightly.
  • Low certainty: Models diverge; treat forecast with caution.

We calculate this by comparing wind speed, gust and direction from multiple models (like GFS, ECMWF, Arome, and Harmonie) and seeing how closely they match. They are weighted, meaning that some models count more than others, depending on how good they are for a certain spot.

Login to do spot actions
Surfnerd Logo
Join Surfnerd+ and get:
  • Weekend
    + weekday forecasts
    (vs weekdays only)
  • 12-day
    forecast range
    (vs 5-day)
  • 1-hour
    forecast steps
    (vs 3-hour)
  • Wave energy
    metric
    (power rating)
  • Secondary & tertiary
    swells
    (complete picture)
"Great Forecasts. Nothing more, nothing less."