@hiker33,
Using service and wallet from Coinbase means you are using a non-custodial wallet, by that I meant you don't have full control on your wallet and your transaction parameters (one of them is fee rate). Later on, you should learn and try to switch to non-custodial wallet, like
Electrum (do your double-check, don't believe in me without your own check).For any non-custodial wallets you use, remember to do following things:
- Download it from official website, never search from app stores because phishing wallets are common on stores and you can be trapped
- Verify wallet before using it (it help you to avoid risks of fund loss because of using fake wallets).
Anyway, you have to make plans for your transactions. If you are not in hurry with your transactions, please make plans to save transaction fees
Companies do transactions in patch payments and even you don't have control (options to choose) on fee rates if you are using custodial wallets like Coinbase, you can still get cheaper fees if you make it when mempool is empty.
Regarding to weekend effects, you can find difference in 2 images, aims at the total size (in MB) of waiting transactions. Do you see a big difference in total size and size for each range of fee rate?
On last Saturday
As of writing today
Just my guess. Based on your post time, it seems you did that transaction around 4 or 5 hours ago. If you did on that period, you moved your coins when fees hit its latest peak (see second image). It means you would have likely be charged by the fee rate from 60 to 70 satoshi/(v)byte. It is a terrible high fee.
Sources to read:
