In August 2025, Florida Keys rec fuel was about $5.14/gal for 89 octane at one reported marina/fuel source, while diesel was $5.28/gal before tax ; at the same time, WTI crude was roughly $62.80 to $67.33 per barrel during the month, ending near $64.01 on August 29.

What that means

Fuel in the Keys was trading at a very large retail premium over crude oil, which is normal because marina fuel prices include refining, transport, local supply constraints, storage, taxes, and dealer margins.

Simple relationship

A rough way to think about it is:

  • Crude oil moved in the mid-60s per barrel.
  • Rec fuel in the Florida Keys was around $5.14 to $5.28 per gallon in the available August 2025 reporting.
  • So the retail price was not a direct one-to-one reflection of oil, but rather a marked-up downstream price influenced by local conditions.

Quick take

If you wanted the shortest answer: Florida Keys rec fuel in August 2025 was around five dollars a gallon, while oil was around mid-60s per barrel, so fuel was much more expensive than crude alone would suggest.

Caveat

The available source is a reported fuel price snapshot rather than a full island-wide monthly average, so the exact August 2025 Keys price could vary by marina and date.