Reef
both
Level 8/10

Sebatu

South Nias, Indonesia
🪸Sharp reef😮‍💨Hold-downs

Sebatu sits outside Lagundri Bay in South Nias, facing the full Indian Ocean swell window and producing serious big-wave conditions. The wave is for committed big-wave chargers only, with heavy, hollow faces that can exceed 15 feet. Its open-ocean exposure means it picks up every swell that the bay misses, offering a completely different challenge to the point breaks inside Lagundri.

3-Day Forecast
Today
30
31
Poor
1.1m
@14s
9km/h
Tue
31
30
Poor
1.0m
@17s
8km/h
Wed
1
30
Poor
0.9m
@16s
6km/h
+7
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Today's Conditions

Swell
1.1m
S(187°)
Score: 3/25
Period
14s
Long period groundswell
Score: 14/25
Wind
9km/h
SE(140°)
Score: 11/25
Weather
28°C
0.2mm97%
Secondary Swell
0.5mSSW
Forecast Confidence
100%
Sources: open-meteo-marine, open-meteo-weather
Best Session
morning
AM: 3 km/h E|PM: 10 km/h SE
3 km/h vs 10 km/h afternoon

Location & Conditions

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0°45°90°135°180°225°270°315°NESW
Swell
Wind
View in OpenStreetMap
Showing forecast for today

Tide Times

4:21 am
High tide - 0.72m
10:12 am
Low tide - 0.27m
4:22 pm
High tide - 0.91m
Times shown in spot-local time.

Strike Score Breakdown

31
Poor
Components
Swell Direction8/25
Swell Size3/25
Swell Period14/25
Wind11/25
Raw Score36/100
Adjustments
⚠️ Weak Component-5
🚫 Undersized Capmax 44
Adjusted Score31/100
Confidence
Multiplier×1.00
Final Score31

Spot Details

Swell Requirements

Optimal direction
SW (220°)
Direction range
180° - 260°
Size range
1.5m - 4.6m
Ideal size
3.8m
Height multiplier
1.08×
Ideal period
16s+

Wind Requirements

Optimal direction
N (0°)
Offshore range
330° - 30°

Tide Requirements

Optimal tide
high
Optimal range
1m - 2m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

8/10

Crowd level

5/10

Access: Fly to Gunungsitoli via Medan, drive to south coast

Best Season

Peak: Apr-Oct

SW swell season (Apr-Oct), SE trade winds offshore

Getting There

Airport
GNS
Drive time
45 min
Data quality
verified

Strike Log

Community Discussion