GoodSeeing
Home › Locations › Phitsanulok

Phitsanulok

16.825° N   100.259° E  ·  50 M
41 /100
PEAK
Marginal, but there is a 2 hours gap from 00:00.
BEST WINDOW 00:00–02:00 · ASTRO DARK 00:00–05:00 · MOON 0%
Transparency
0.28
Seeing
1.00
Cloud
38%
Moon
0%

Fair tonight

Hour by hour, local to Phitsanulok. Colour encodes the score and nothing else; every other measurement is luminance.

Sky state
Lighter = daylight and twilight  ·  unshaded = astronomical dark
Score
00
01
02
03
04
05
06
39
36
30
41
19
5
0
BEST WINDOW
Low cloud
12%
6%
11%
8%
12%
8%
6%
Mid cloud
30%
34%
34%
35%
70%
98%
29%
High cloud
22%
39%
56%
15%
31%
24%
41%
Transparency
0.23
0.26
0.26
0.28
0.27
0.26
0.24
Seeing
1.00
1.00
1.00
1.00
1.00
1.00
1.00
Moon clear
down
down
down
down
down
down
down
Inspect

Cloud tracks show clear sky — a longer bar is better. The figure inside each track is the raw measurement.

Why this hour scored what it did
00 Fair · 39/100
Starting from
100
Cloud
−43
Transparency
−18
Seeing
−0
Moonlight
−0
Darkness
−0
Score
39
CLOUD 38% LOW 12% MID 30% HIGH 22% SUN -57.7° MOON -56.5° / 0% WIND 1 TEMP 27°
Excellent 75+ Good 55+ Fair 35+ Poor 15+ Not worth it Seeing is estimated from surface wind — see how we score.
Tonight's limiting factor
When a clear gap is worth driving for

Ask how long the gap is relative to your setup time and your exposure length. A two-hour gap is a real session for a visual observer and close to worthless for someone doing four-minute subs on a target that needs three hours.

What are you doing tonight?

The same forecast, weighted for the target. Planetary work barely cares about moonlight; long exposures die on high cloud a visual observer would never notice.

SET UP 23:30 · OBSERVE 00:00–02:00 · 2H · MEAN 37

Darkness and moonlight dominate. Faint fuzzies need a genuinely dark sky more than they need steady air.

00020406
CLOUD RETURNS 02:00
SET UP 23:30 · OBSERVE 00:00–04:00 · 4H · MEAN 44

Seeing is everything and moonlight is irrelevant. Bright targets punch through twilight, so darkness barely counts.

00020406
CLOUD RETURNS 04:00MOONLIGHT IGNORED FOR THIS TARGET
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 37

Tolerates soft seeing, but high cloud wrecks a wide frame and moonlight raises the background everywhere.

00020406
HIGH CLOUD CLEARS 03:00CLOUD RETURNS 04:00
NO USABLE WINDOW FOR THIS TARGET TONIGHT

Needs conditions to hold still for hours. Sustained transparency matters more than any single good hour.

00020406
CONDITIONS STAY BELOW THE USABLE THRESHOLD
SET UP 02:30 · OBSERVE 03:00–04:00 · 1H · MEAN 39

Naked eye, whole sky. Total cloud and moonlight are the only things that count.

00020406
HIGH CLOUD CLEARS 03:00CLOUD RETURNS 04:00
Advertisement
Reserved

The next week of nights

Tonight · 12 Aug
41
Fair
MOON 0%
00:00–02:00
Tomorrow · 13 Aug
32
Poor
MOON 1%
Friday · 14 Aug
39
Fair
MOON 5%
03:00–05:00
Saturday · 15 Aug
7
Clouded out
MOON 10%
Sunday · 16 Aug
9
Clouded out
MOON 19%
Monday · 17 Aug
8
Clouded out
MOON 28%
Tuesday · 18 Aug
20
Poor
MOON 37%
Advertisement
Reserved

Nearby locations

About this forecast

Conditions for Phitsanulok, Thailand are computed from the MET Norway forecast model for these exact coordinates, combined with sun and moon positions we calculate directly. The score weighs cloud cover by layer, atmospheric transparency, estimated seeing, moonlight and how dark the sky actually gets. Read the full method →