While those without a sense of adventure need not apply, Gabon has some hefty Atlantic sails in generally calm waters during the spring and summer.
Why You Should Go: Look for five to 10 shots on typical days, with the sails running a respectable 70 to 75 pounds or so (but some approaching twice that size are caught here). Blue marlin are likely to crash the party at any time. Don't look for other boats fishing sails; you won't see any. You can fish estuaries for huge tarpon as well as cubera snapper and giant threadfin. Game sanctuaries nearby offer wild Africa at its most exhilarating.
But... The round-trip flight to Libreville will run you a couple grand plus and require at least 24 hours each way. Not much infrastructure here for offshore sport fishing.