Reef
left
Level 7/10

Asu

Hinako Islands, Indonesia
🪸Sharp reef🏝️Remote🚶Difficult access

Asu is Indonesia's best-kept secret left—a pristine, barreling wave off a speck of an island in the Hinako group that few surfers ever reach. The journey here is an adventure in itself: flights, boat transfers, and basic island living, but the reward is potentially perfect waves with a handful of other surfers at most. The left reels along a coral-strewn reef, offering long, makeable barrels when the Indian Ocean delivers. Asu represents the ultimate surf trip ethos: go further, score better, embrace the simple life.

10-Day Forecast
Mon17
65
Good
1.7m@13s
18km/h
Tue18
72
Good
1.8m@18s
13km/h
Wed19
65
Good
2.9m@18s
9km/h
Thu20
67
Good
3.3m@16s
12km/h
Fri21
78
Good
2.7m@16s
14km/h
Sat22
77
Good
2.5m@16s
17km/h
Sun23
77
Good
2.1m@15s
14km/h
Mon24
71
Good
1.5m@14s
13km/h
Tue25
66
Good
1.6m@15s
12km/h
Wed26
78
Good
1.1m@13s
7km/h
Groomed 5+ days out, less certain

Today's Conditions

Find Flights
Best session: MorningAM 18 km/h · PM 16 km/h · High tide at 8am (0.6m)
Swell
1.7m
S(176°)
Score: 14/25
Period
13s
Medium period swell
Score: 23/25
Wind
18km/h
SE(134°)
Score: 23/25
Weather
29°C
0.0mm42%
First light 6:00amSunrise 6:30amSunset 6:38pmLast light 7:08pm
Windswell0.2m@2sSecondary0.5mConfidence
100%

Location & Conditions

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

Hourly Forecast, Tide & Strike Windows

Strike window: 6:33–9:40am · through highIdeal tide: 0.5–1.5m
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
6am
9am
12pm
3pm
6pm
°C
28°
29°
29°
29°
29°
28°
27°
28°
29°
28°
27°
27°
26°
27°
27°
27°
28°
28°
28°
28°
28°
28°
29°
29°
29°
28°
28°
29°
29°
30°
26°
26°
28°
29°
29°
27°
27°
27°
27°
28°
27°
27°
27°
27°
28°
27°
27°
28°
29°
29°
4m2.0
sec
13s
13s
13s
13s
13s
18s
18s
18s
18s
18s
18s
18s
18s
18s
18s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
15s
15s
15s
15s
15s
14s
14s
14s
14s
14s
15s
15s
15s
15s
15s
13s
13s
13s
13s
13s
swell
windkm/h
16g21
20g27
20g26
17g25
15g21
12g18
16g21
17g23
14g22
13g19
10g15
10g16
13g32
4g14
8g14
8g14
13g18
17g22
10g24
8g18
11g16
14g19
15g21
15g21
13g21
21g28
21g31
17g30
12g29
14g22
14g29
12g27
13g25
15g25
16g25
18g24
15g26
11g28
11g26
13g22
12g28
10g27
12g24
13g22
14g21
9g21
8g18
8g16
6g14
3g14
tidem
2:07am0.0m
8:04am0.6m
2:15pm0.0m
8:38pm0.6m
2:47am0.1m
8:30am0.5m
2:30pm0.0m
9:10pm0.6m
3:30am0.1m
9:10am0.4m
3:06pm0.1m
10:06pm0.5m
4:45am0.2m
9:10am0.3m
3:30pm0.1m
6:30am0.2m
10:30am0.2m
4:30pm0.1m
12:50am0.4m
9:00am0.2m
1:30pm0.2m
5:30pm0.2m
2:10am0.5m
10:10am0.1m
3:30pm0.3m
8:30pm0.2m
3:15am0.5m
10:42am0.1m
4:00pm0.3m
9:30pm0.1m
4:15am0.6m
11:06am0.1m
4:42pm0.3m
10:06pm0.1m
4:47am0.6m
Ideal tideStrike windowNight

Tide times today

2:07 am
Low tide - 0.04m
8:04 am
High tide - 0.59m
2:15 pm
Low tide - 0.00m
8:38 pm
High tide - 0.61m
Times shown in spot-local time.

Strike Score Breakdown

65
Good
Components
Swell Direction4/25
Swell Size14/25
Swell Period23/25
Wind23/25
Raw Score64/100
Adjustments
🌊 Tide+1
Adjusted Score65/100
Confidence
Multiplier×1.00
Final Score65
🌊 Partly in the tide window👥 Independence Day

Plan Your Strike

Return flights to GNS, departing today with a 5-day trip window.

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Swell Requirements

Optimal direction
SW (225°)
Direction range
200° - 250°
Size range
1m - 3m
Ideal size
2.4m
Height multiplier
0.97×
Ideal period
14s+

Wind Requirements

Optimal direction
SE (135°)
Offshore range
90° - 180°

Tide Requirements

Optimal tide
mid to high
Optimal range
0.5m - 1.5m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

7/10

Crowd level

2/10

Access: Boat from Nias or Sibolga.

Frequently Asked Questions

What tide is best at Asu?

Asu works best on a mid to high tide, ideally between 0.5m and 1.5m on the local tide chart. The tide chart above shows today’s strike window.

What wind direction is offshore at Asu?

Offshore wind at Asu blows from the SE (135°). Anything in the 90° to 180° range grooms the faces; outside it, expect chop or bumpy conditions.

What swell size and direction work best at Asu?

Asu wants SW swell (200° to 250°) between 1m and 3m, with a period of 14s or more for quality waves.

When is the best time of year to surf Asu?

The main season at Asu is Apr-Oct. April-October. Indian Ocean swells.

How do I get to Asu?

Fly into GNS, then allow about 0 minutes by road, plus a boat transfer (around $180 USD). Boat from Nias or Sibolga.

What kind of wave is Asu?

Asu is a reef break, a left-hander. Difficulty is rated 7/10.

Best Season

Peak: Apr-Oct

April-October. Indian Ocean swells.

Getting There

Airport
GNS
Drive time
0 min
Boat required
$180
Data quality
verified

Strike Log

Community Discussion