MORE THAN LIKELY...

It is your thermocoupler (a small tubed device - when the pilot light warms it - it will permit gas to flow to the "burners ")

The pilot light will sometimes blowout / extinguish in the wind.

Look in the area immedately above where the pilot light would flame.
Find the tubular area in that region.
..gently tap, tap, tap, tap....for a total of 60 seconds...up, down, and sidewise.

Try the starting procedure again.

May you shower warm in the morning.

Sincerely,
Gargoyle


A water heater is good for 10 to 25 years(depending on make and local
water conditions)

I dare not approach anoids