Sea View — Yuigahama Beach

Today's Ocean Viewing Index and the six sub-indices behind it.

Ocean Viewing Index

Updated · Sep 8, 2026 17:26

Reference time: local noon · 11:52 (Asia/Tokyo)

Estimated
85
Excellent

Excellent viewing conditions. Highly recommended!

Sub-Index Breakdown

Six dimensions feed the overall Ocean Viewing Index.

  • Sea Color
    Vivid turquoise / azure · hue
    81
  • Clarity
    Very clear (below 1.5 NTU) · NTU
    100
  • Visibility
    8–15 m · m
    78.3
  • Sea State
    Light breeze (2-3) · Beaufort
    77.1
  • Lighting
    Golden hour, optimal · lux
    100
  • Water Quality
    index
    —

Sea Color

Observed Sep 8, 2026

Climatology
Blue — Clear
#1e5fa8
Turbidity
12.70 NTU
Chlorophyll
0.63 mg/m³

FU=4, hue=194°, Kd490=0.134

Sea color through the day

The FU index represents the inherent color around local noon (closest to the true sea color); perceived color varies slightly by time of day with light and weather.

Morning08:00
Soft green-blue
#0284c7

Cloudy/hazy conditions darken the apparent color

Noon11:52
Natural sea color
#1e5fa8

Cloudy/hazy conditions darken the apparent color

Afternoon15:00
Deep blue
#1e3a6e

Cloudy/hazy conditions darken the apparent color

Dusk18:00
Deep indigo (low light)
#1e3a6e

Cloudy/hazy conditions darken the apparent color

Local noon · 11:52 (Asia/Tokyo)

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.

7-Day Sub-Index Forecast

Six dimensions of ocean viewing quality over the coming week.

Sea Color
Tue
Wed
Thu
Fri
Sat
Sun
Mon
Sea color (Forel-Ule scale) — empty block means no verified data.