Sea View — Unawatuna Beach

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

Ocean Viewing Index

Updated · Sep 8, 2026 17:10

Reference time: local noon · 12:19 (Asia/Colombo)

Estimated
67
Good

Good conditions. Worth a visit.

Sub-Index Breakdown

Six dimensions feed the overall Ocean Viewing Index.

  • Sea Color
    Clear blue-green · hue
    79.3
  • Clarity
    Very clear (below 1.5 NTU) · NTU
    100
  • Visibility
    Under 8 m · m
    15.2
  • Sea State
    Choppy (4+) · Beaufort
    57.3
  • Lighting
    Golden hour, optimal · lux
    87.7
  • Water Quality
    index
    —

Sea Color

Observed Sep 8, 2026

Climatology
Blue — Clear
#1e5fa8
Turbidity
12.20 NTU
Chlorophyll
0.65 mg/m³

FU=4, hue=196°, Kd490=0.139

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

Noon12:19
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 · 12:19 (Asia/Colombo)

7-Day OVI Trend

Forecast ocean viewing conditions for the coming week.

Best on Fri: 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.