What is the Ocean Viewing Index (OVI) for Hac Sa Beach?

OVI is a 0-100 composite score combining sea color, water clarity, visibility, sea conditions, sunlight and water quality to help you decide if the sea is worth seeing today.

When is the best time to visit Hac Sa Beach for sea views?

Start with the current and 7-day OVI forecast for Hac Sa Beach, then choose a daylight period that also fits your plan. If you want tide pools, exposed shore, or a tide-dependent walk, check the local high and low tide times as well.

Should I use tide times or OVI for a visit to Hac Sa Beach?

Use tide times when your visit depends on water level, such as a sandbar, tide pool, or exposed rocks. Use OVI to compare likely sightseeing conditions including sea appearance, visibility, sea state, and lighting. For a coastal trip, read both together.

Hac Sa Beach Tides & Ocean Viewing Index

Coloane, MacauAsia/Macau

Ocean View Index

81Excellent

Next tide

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Sunrise / Sunset

22:25 – 09:54

Local time

06:33

Hac Sa Beach on Coloane, Macau's largest natural beach with distinctive black mineral sand.

Ocean Viewing Index

Updated · Oct 23, 2026 20:59

Reference time: local noon · 12:10 (Asia/Macau)

Estimated

Excellent

Excellent viewing conditions. Highly recommended!

Sub-Index Breakdown

Six dimensions feed the overall Ocean Viewing Index.

Sea Color
Clear blue-green · hue
75.3
Clarity
Turbid · NTU
49.3
Visibility
15+ m horizontal · m
100
Sea State
Calm, glassy (0-1) · Beaufort
100
Lighting
Golden hour, optimal · lux
98.6
Water Quality
index
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Weather Forecast

7-day marine weather forecast from Open-Meteo model.

TodayOct 23

Overcast

32°22°

4.1 m/s

SatOct 24

Overcast

32°23°

3.1 m/s

SunOct 25

Overcast

31°23°

2.6 m/s

MonOct 26

Light Rain

30°25°

3.2 m/s

0.2mm

TueOct 27

Light Rain

31°25°

4.2 m/s

1.2mm

WedOct 28

Light Rain

28°25°

4.9 m/s

0.2mm

ThuOct 29

Light Rain

30°24°

2.6 m/s

0.1mm

Visibility: 20 km·Cloud: 13%

48-Hour Hourly Forecast

Hour-by-hour marine weather for the next 48 hours.

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7-Day OVI Trend

Forecast ocean viewing conditions for the coming week.

Best today: Viewing conditions are Excellent; aim for the golden hour just after sunrise or before sunset. Great for snorkeling and photography.

High & Low Tides Today

Times and heights of today's high and low water.

Mixed TideCoefficient: 77.6 / 120Higher coefficient means larger tide range; 120 is the largest spring, 20 the smallest neap.

Time	Type	Height
No tide extremes recorded today.

Fishing & Surf Forecast

Solunar feeding times and today's surf rating.

80Excellent2Very PoorView full forecast

48-Hour OVI Trend

Hour-by-hour ocean viewing outlook for the next 48 hours, dampened by rainfall.

Today's Tide Summary

A quick look at the day's high and low water.

Best Months to Visit

Average Ocean Viewing Index by month over the past year.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Based on historical climatology (Pitarch 2021)

Nearby Beaches

Other beaches closest to Hac Sa Beach.

0.8 km away

Cheoc Van Beach

Coloane, Macau

8.1 km away

Nam Van Lake

Macau Peninsula, Macau

65 km away

Repulse Bay Beach

Hong Kong Island, Hong Kong

69 km away

Stanley Beach

Hong Kong Island, Hong Kong

Frequently asked questions

What is the Ocean Viewing Index (OVI) for Hac Sa Beach?: OVI is a 0-100 composite score combining sea color, water clarity, visibility, sea conditions, sunlight and water quality to help you decide if the sea is worth seeing today.
When is the best time to visit Hac Sa Beach for sea views?: Start with the current and 7-day OVI forecast for Hac Sa Beach, then choose a daylight period that also fits your plan. If you want tide pools, exposed shore, or a tide-dependent walk, check the local high and low tide times as well.
Should I use tide times or OVI for a visit to Hac Sa Beach?: Use tide times when your visit depends on water level, such as a sandbar, tide pool, or exposed rocks. Use OVI to compare likely sightseeing conditions including sea appearance, visibility, sea state, and lighting. For a coastal trip, read both together.

Essential Information

Coordinates: 22.1222°, 113.5756°
Timezone: Asia/Macau
Region & Country: Coloane, Macau

Data sources

Tides: UHSLC / FES2022b · Weather: NOAA GFS · Sea color: NASA MODIS/VIIRS