Shamrock Island Preserve

Sky Score 33/100≈ Bortle 4

Shamrock Island Preserve is a protected area in Texas with a measured darkness of 58/100 (≈ Bortle 4) — a usable sky for casual stargazing, though city glow is noticeable. The best month to come is typically October, when about 61% of the night sky is clear.

Tonight's outlook: 35/100. The moon is 7% lit and above the horizon 13% of the night; typical August clear-sky odds here are 50%. Updated daily.

Best time to stargaze at Shamrock Island Preserve

MonthClear night skiesSky Score (new moon)
January43%31/100
February42%31/100
March41%31/100
April40%30/100
May44%32/100
June51%35/100
July49%34/100
August50%35/100
September52%36/100
October ★61%40/100
November47%33/100
December43%32/100

Scores assume a moonless night — check the moon before you drive (methodology).

Where to stay near Shamrock Island Preserve

Each place below is rated for the darkness at its own doorstep — stay dark, and the sky is yours from the parking lot.

Booking links are affiliate links — disclosure.

Nearby spots in Texas