What is the Ocean Viewing Index (OVI) for Tumon Bay 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 Tumon Bay Beach for sea views?

Start with the current and 7-day OVI forecast for Tumon Bay 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 Tumon Bay 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.

Tumon Bay Beach Tides & Ocean Viewing Index

Tumon, GuamPacific/Guam

Ocean View Index

76Good

Next tide

23:35High Tide

Sunrise / Sunset

20:12 – 07:57

Local time

07:10

Tumon Bay in Guam, a Micronesian resort hub of white sand and duty-free shopping.

Ocean Viewing Index

Updated · Oct 23, 2026 20:35

Reference time: local noon · 12:05 (Pacific/Guam)

Estimated

Good

Good conditions. Worth a visit.

Sub-Index Breakdown

Six dimensions feed the overall Ocean Viewing Index.

Sea Color
Vivid turquoise / azure · hue
99.1
Clarity
Very clear (below 1.5 NTU) · NTU
100
Visibility
Under 8 m · m
19.5
Sea State
Light breeze (2-3) · Beaufort
66.1
Lighting
Golden hour, optimal · lux
100
Water Quality
index
—

Weather Forecast

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

TodayOct 23

Rain

32°26°

4.5 m/s

1.8mm

SatOct 24

Rain

32°26°

4.2 m/s

7.9mm

SunOct 25

Rain

32°25°

4.5 m/s

7.9mm

MonOct 26

Light Rain

32°25°

3.9 m/s

0.5mm

TueOct 27

Light Rain

33°26°

2.0 m/s

0.6mm

WedOct 28

Light Rain

31°26°

2.4 m/s

8.6mm

ThuOct 29

Light Rain

32°25°

3.6 m/s

0.9mm

Visibility: 29 km·Cloud: 19%

48-Hour Hourly Forecast

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

Now31°61.3

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7-Day OVI Trend

Forecast ocean viewing conditions for the coming week.

Best on Tue: 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
23:35	High	1.14 m

Fishing & Surf Forecast

Solunar feeding times and today's surf rating.

80Excellent85EpicView 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.

High Tide

23:35

1.14 m

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 Tumon Bay Beach.

212 km away

Micro Beach

Saipan, Northern Mariana Islands

1353 km away

Koror Rock Islands

Koror, Palau

2275 km away

Naminoue Beach

Okinawa, Japan

2277 km away

Sunset Beach

Okinawa, Japan

Frequently asked questions

What is the Ocean Viewing Index (OVI) for Tumon Bay 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 Tumon Bay Beach for sea views?: Start with the current and 7-day OVI forecast for Tumon Bay 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 Tumon Bay 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: 13.5197°, 144.8047°
Timezone: Pacific/Guam
Region & Country: Tumon, Guam

Data sources

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