Reef
both
Level 5/10

Cobblestones

East Sumbawa, Indonesia
🪸Sharp reef

Cobblestones is a small channel break near Lakey Peak in East Sumbawa, offering both lefts and rights on a compact reef. The wave provides a fun option when the main breaks are too crowded or too big, with shorter rides and a more relaxed atmosphere. It's one of several satellite breaks in the Hu'u area that extends the surfable options beyond the famous Lakey Peak and Lakey Pipe.

3-Day Forecast
Tue
17
84
Firing
1.5m
@16s
7km/h
Wed
18
84
Firing
1.4m
@16s
7km/h
Thu
19
80
Firing
1.2m
@15s
6km/h
+7
Unlock

Today's Conditions

Swell
1.5m
SW(219°)
Score: 22/25
Period
16s
Long period groundswell
Score: 25/25
Wind
7km/h
SW(218°)
Score: 15/25
Weather
26°C
0.0mm89%
Windswell Component
0.1mSW@2s
Secondary Swell
0.1mESE
Forecast Confidence
100%
Sources: open-meteo-marine, open-meteo-weather
Best Session
morning

Location & Conditions

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

Tide Times

3:18 am
Low tide - -0.34m
9:39 am
High tide - 1.42m
3:21 pm
Low tide - -0.02m
9:20 pm
High tide - 1.68m
Times shown in spot-local time.

Strike Score Breakdown

84
Firing
Components
Swell Direction22/25
Swell Size22/25
Swell Period25/25
Wind15/25
Raw Score84/100
Confidence
Multiplier×1.00
Final Score84

Spot Details

Swell Requirements

Optimal direction
SW (215°)
Direction range
200° - 230°
Size range
0.9m - 1.8m
Ideal size
1.6m
Height multiplier
1.03×
Ideal period
14s+

Wind Requirements

Optimal direction
E (90°)
Offshore range
60° - 120°
Best window
morning

Tide Requirements

Optimal tide
mid
Optimal range
0.5m - 1.5m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

5/10

Crowd level

4/10

Best Season

Peak: Apr-Oct

Secondary: Nov, Dec, Jan, Feb, Mar

Best Apr-Oct (dry season, SE trades offshore). Swells year-round but wet season brings onshore winds.

Getting There

Airport
BMU
Drive time
30 min
Data quality
community

Strike Log

Community Discussion